Journal Title (these two may be Book Title and Chapter
Article Title Title or Website Name and Webpage Title, etc.)
Year of Publication
There are a few other items depending on what type of source:
Publisher & Location
Volume & Issue Number
URL Where Item Was Retrieved From
Here's an example with the various parts labeled:
Citations in General (Excerpted from the Purdue OWL: Citation Chart)
The American Psychological Association (APA) provides a method for source documentation that is used in most social sciences courses. The social sciences place emphasis on the date a work was created, so most APA citation involves recording the date of a particular work in the physical text. The date is usually placed immediately after the author’s name in the “References” page at the end of an essay. The most recent APA formatting can be found in the sixth edition of the APA manual.
Book citations in APA generally require author name, publication year, work title, publication city, and publisher.
In APA periodical citation, authors are named by their last name followed by initials; the publication year goes between parentheses and is followed by a period. Only the first word and proper nouns are capitalized for article titles. Periodical titles are written in title case and followed by the volume number, which, with the title, is also italicized.
In APA citation, online sources often include what are known as DOIs, or digital object identifiers. If a DOI is available, it is used in place of a URL. The DOI is a serial number that identifies the source regardless of URL changes, and it can often be found on the first page of an online source. APA generally cites author, date, page title, site title, available page numbers, and a URL or DOI.
Electronic sources in APA format may include a digital object identifier (DOI) number. When a DOI is evident, it may be used in place of a URL address. An online source should include either a DOI or a URL.
All lines after the first line of each entry in your reference list should be indented one-half inch from the left margin. This is called hanging indentation.
Authors' names are inverted (last name first); give the last name and initials for all authors of a particular work for up to and including seven authors. If the work has more than seven authors, list the first six authors and then use ellipses after the sixth author's name. After the ellipses, list the last author's name of the work.
Reference list entries should be alphabetized by the last name of the first author of each work.
If you have more than one article by the same author, single-author references or multiple-author references with the exact same authors in the exact same order are listed in order by the year of publication, starting with the earliest.
Capitalize all major words in journal titles.
When referring to books, chapters, articles, or Web pages, capitalize only the first letter of the first word of a title and subtitle, the first word after a colon or a dash in the title, and proper nouns. Do not capitalize the first letter of the second word in a hyphenated compound word.
Italicize titles of longer works such as books and journals.