I saved the following information from the book used in the below example. Basically, you want to document what is your source, how can someone else find it to see for themselves, and if it is not readily available an abstract or transcript would be nice.
Citation Components
A citation has the following components:
Author, Title, Publisher, Locator
- Author: format can be "First Name Last Name" or "Last Name, First Name."
- Title: format can be Title or Title. Also article titles may precede publication title.
- Publisher: format often includes publisher location, name and year published and sometimes in parentheses.
- Locator: usually a page number or range of page numbers depending upon the source type.
In addition, for online sources you may need:
- Accessed: list date when source located as in "accessed on March 29, 2009."
- Examined: list search criteria as in "examined for any reference to 'xyz'."
The Chicago Style is preferred on Wikitree:
Chicago - refers to The Chicago Manual of Style which is a style guide for American English. It is the style most often used by genealogists.
- Mills, Elizabeth Shown. Evidence Explained: Citing History Sources from Artifacts to Cyberspace. Baltimore, Maryland: Genealogical Pub Co, 2007.
I have more examples at the very bottom of this free-space I made:
https://www.wikitree.com/wiki/Space:WikiTree_Templates