Gaya APA

Blass, L., Hartmann, P. (2007). QUEST 1 Listening and Speaking (Ed. 2). New York: McGraw-Hill Companies, Inc.

Gaya MLA

Blass, Laurie., Hartmann, Pamela. "QUEST 1 Listening and Speaking". Ed. 2 New York: McGraw-Hill Companies, Inc, 2007. Text.