Note that the use of these templates is not required.
Use of these templates is manual, authors may copy-and-paste the desired template into their text, and erase fields they do not need. Remember the {{double curly braces}}, and a vertical bar between fields.
Introductory ("Beginner" and "Tutorial") pages such as the CITING SOURCES tab in the Wikipedia:Tutorial page do not necessarily cover templates. Another template which covers all these uses may be found at Citation. For more information see Wikipedia:Citing sources.
If you are using the inline reference citation style in your article (using <ref> tags to create footnotes), then these templates would go inside the <ref> tags as follows:
<ref>{{cite book|author=...}}</ref>
See full list of citation templates at Wikipedia:Citation templates. For other templates, see Wikipedia:Template namespace.