Gaya APA

Mann, David, Schmitt, Norbert, Schmitt, Diane. (2011). Focus on Vocabulary 1 . New York: PEARSON Longman.

Gaya Chicago

Mann, David, Schmitt, Norbert, Schmitt, Diane. Focus on Vocabulary 1. New York: PEARSON Longman, 2011. .

Gaya MLA

Mann, David, Schmitt, Norbert, Schmitt, Diane. Focus on Vocabulary 1. New York: PEARSON Longman, 2011. .

Gaya Turabian

Mann, David, Schmitt, Norbert, Schmitt, Diane. Focus on Vocabulary 1. New York: PEARSON Longman, 2011. .