This may give you some ideas for doing research. A citation is what you find in indexes and in bibliographies.
Citations are also part of the information on catalog cards and other library records.
Citations may be footnotes. You will need to know how to make citations when it comes time to make footnotes and bibliographies for you research papers. Of course you can cite recorded music, dance, video, maps, movies, et c. and just about anything as long as a library can collect it. Armed with Madness . Hannah and the Peacocks .