If an encyclopedia or dictionary entry does not indicate a specific author or co-authors, begin the citation with a group author such as Merriam-Webster or American Psychological Association, followed by the year of publication in round brackets.
Capitalize the first letter of the first word of the title of the entry and the title of the encyclopedia or dictionary.
Capitalize the first letter of proper names in titles, such as names of places or people. Example: Canada
Publication Information for Online Encyclopedias and Dictonaries
Include the publisher name for an encyclopedia or dictionary where clearly identified, just as with a book or ebook. If the author and publisher are the same, omit the publisher element.
Some electronic content is assigned a unique number called a Digital Object Identifier (DOI). If a DOI is provided for an encyclopedia or dictionary, include it after the name of the encyclopedia or dictionary of the entry and edition beginning with "https:"
You do not need to put a period after a DOI number.
If you accessed the encyclopedia or dictionary through a website, provide the url. If the encyclopedia or dictionary provides stable archived versions, link to the latest one without "retrieved from"; no statement of the retrieval date is necessary in this case. A statement of the retrieval date should be provided for any web pages that are dynamic and not archived. When in doubt, provide a retrieval date to help the reader in case the entry you use is updated between the time you read it and the time your reader looks at it.
In-Text Citation - Page Numbers
Page numbers may not be available for an online dictionary or encyclopedia entry. Here are some options if you have no page numbers and you are quoting directly:
Count the paragraphs, and use that number where you'd normally put the page number. Put the word "para." in front of it. Example: (Smith, 2012, para. 3). This example refers to the third paragraph in the entry.
If the entry has section headings, you can use those. Encyclopedia entries often have section headings. Enter the section heading name, followed by the word "section" and then the number of the paragraph within that section. Example: (Smith, 2012, Climate section, para. 2). This example refers to the second paragraph under the Climate section of the entry.
If there is only one paragraph and no headings, as may be the case for many dictionary entries, skip the page/paragraph/section information and give the author's name and date only. Example: (Smith, 2012)