Gaya APA

Maris, Amanda. (2007). Challenges Workbook 1 (Cet 1). New York: Pearson Longman.

Gaya Chicago

Maris, Amanda. Challenges Workbook 1. Cet 1 New York: Pearson Longman, 2007. Text.

Gaya MLA

Maris, Amanda. Challenges Workbook 1. Cet 1 New York: Pearson Longman, 2007. Text.

Gaya Turabian

Maris, Amanda. Challenges Workbook 1. Cet 1 New York: Pearson Longman, 2007. Print.