First, check to see if the information is really missing by searching the title of the article, book, etc. at search.crossref.org.
What Is Missing?
Author. (date). Title. URL
Author See note below.
Title takes its place.
Title. (date). URL.
Use n.d. for no date.
Author. (n.d.). Title. URL.
Use ca. followed by year in parentheses.
Author. [ca. date]. Title. URL
Use a description instead.
Author. (date). [Description of document]. URL
If no issue, leave it out.
Author. (date). Title. Journal, vol., pgs. URL
Author & Date
Combine author & date methods above.
Title. (n.d.). Retrieved from URL
Author & Title
Combine author & title methods above.
[Description of document]. (date). URL
Date & Title
Combine date & title methods above.
Author. (n.d.). [Description of document]. URL
Author, Date & Title
Combine author, date & title methods above.
[Description of document]. (n.d.). URL
MORE ON AUTHOR: The author may be an institutional author; this is very common for webpages. In the case of an institutional author, cite the full institutional name in the author name place (examples below). Otherwise, use the table above.
Centers for Disease Control and Prevention. (2012). Adolescent health.Retrieved from http://www.cdc.gov/healthyyouth/adolescenthealth/index.htm
World Health Organization. (2015). Physical activity. Retrieved from http://www.who.int/mediacentre/factsheets/fs385/en/
Alphabetize letter by letter beginning with the first authors' last names.
Alphabetize prefixes such as Mc and Mac literally.
Alphabetize surnames that contain articles and prepositions (de, la, du, von, etc.) according to the rules of the language of origin.
Alphabetize items with numerals as if the numerals were spelled out.
Alphabetize group authors such as associations or agencies by the first significant word of the name, and use the full official name, not an acronym.
If the author is designated as Anonymous, then the entry is alphabetized as if Anonymous were a true name.
If there is no author, the entry is alphabetized by the first significant word in the title.