Gaya APA

Cotton, D., Simon, I, F, D, I, K. (2006). Market leader : Upper-intermediate business English course book . Longman, 2006: Longman, 2006.

Gaya MLA

Cotton, David., Simon, I., Falvey,, David, II., Kent,. "Market leader : Upper-intermediate business English course book". Longman, 2006: Longman, 2006, 2006. .