This is the style with "author" -- and "page number" (if relevant).
Scentists have proved that mice can sing (Mice Research). But others disagree (Smith, Brown, and Kaser 135).
This is the style with "author" and "date" -- and "page number" (if relevant). For example:
Scientists have proved that mice can sing ("Mice Research," 2012). But others disagree (Smith, Brown, & Kaser, 2013, p. 135).
This is the "foonotes" style.
Scientists have proved that mice can sing.1 But others disgree.2
1. "Mice Research," Scientists United, 2012, accessed September 1, 2014, http://sciunited.com/miceresearch.
2. Anne Smith, Nancy Brown, and Kate Kaser, Research on Mice and Music (London: Oxford University Press, 2013), 135.
NOTE: All three of the styles above would still have a "Works Cited" or "Bibliography" section at the end of the paper, where all the sources are listed alphabetically, in one list.
Websites to stretch your brain . Browse, read, and let your mind wander.
The library has developed some guides to help you explore a discipline and find resources -- both print and digital. These are good places to start if you think you want to do your Extended Essay in this area. (More will be forthcoming...)
You may find the Dover library guides useful as well.