Although a number of "hits" come up on an internet search of "Sun Wukong" they are somewhat lacking in depth. I think your best bet for sources will be your school library's database. There you will have access to scholarly journals which will give you a more in-depth treatment of the topic than is available on websites. JSTOR, for example, is a large scholarly journal archive with articles on wide-ranging topics. If you still have trouble finding anything in the library's database, you can ask for assistance with finding articles from the librarian, who is trained in this type of research.
I hope this helps get you started!