This page contains examples of various types of inline citations. Variations on all of the examples included here exist throughout Wikipedia.
As of July 2009[update], Wikipedia's guideline on citation styles includes the following guidance:
All citation techniques require detailed full citations to be provided for each source used. Full citations must contain enough information for other editors to identify the specific published work you used. There are a number of styles used in different fields. They all include the same information but vary in punctuation and the order of the author's name, publication date, title, and page numbers. Any of these styles is acceptable on Wikipedia so long as articles are internally consistent. You should follow the style already established in an article, if it has one. Where there is disagreement, the style used by the first editor to use one should be respected. There are some specific examples of citations here.