APA Style

Wilson, W, ;, B, R. (1998). Fifty-fifty Book Two : An Intermediate Course in Communicative English (2nd Ed.). Hongkong: Longman Asia ELT.

MLA Style

Wilson, Warren, ;, Barnard,, Roger. "Fifty-fifty Book Two : An Intermediate Course in Communicative English". 2nd Ed. Hongkong: Longman Asia ELT, 1998. BOOK.