A manual for writers of research papers, theses, and dissertations, 7th edition - Kate L. Turabian 2007

Informally published electronic sources - Web sites
Parenthetical citations–reference list style: citing specific types of sources
Part II. Source Citation

Material that is informally published, or “posted,” online will often lack the standard facts of publication—author, title, publisher, or date. Even if you can determine few or no facts of publication, you must still include information beyond the URL in your reference list. If you cite only a URL and that URL changes or becomes obsolete, your citation becomes useless to readers. The URL tells where the material was located when you consulted it; a complete citation must also indicate what a source is and the date on which you last accessed it (see 15.4.1).

19.7.1 Web sites

For original content from online sources other than books or periodicals, include as much of the following as you can in your reference list: author, title of the page (in roman type, not enclosed in quotation marks), title or owner of the site, URL, and access date (or range of access dates).

R: Evanston Public Library Board of Trustees. Evanston Public Library strategic plan, 2000—2010: A decade of outreach. Evanston Public Library. http://www.epl.org/library/strategic-plan-00.html (accessed June 1—August 15, 2005).

If there is no named author, give the name of the owner of the site.

R: Federation of American Scientists. Resolution comparison: Reading license plates and headlines. http://www.fas.org/irp/imint/resolve5.html (accessed June 1, 2005).

Use descriptive phrases for content from informal sites, such as personal home pages and fan sites, where titles may be lacking.

R: Camp Taconic Alumni. 1955 photo gallery. http://www.taconicalumni.org/1955.html (accessed June 1, 2005).

To cite a Web site without a formal publication date in your text, give the name of the author or site owner or the descriptive phrase used in the reference list entry. Include this information either in parentheses or in the text.

As indicated on the Federation of American Scientists' Web site . . .