Gaya APA

Harrera, Mario, Pinkley, Diane. (2005). Workbook Backpack 5 . New York: Pearson Longman.

Gaya Chicago

Harrera, Mario, Pinkley, Diane. Workbook Backpack 5. New York: Pearson Longman, 2005. Text.

Gaya MLA

Harrera, Mario, Pinkley, Diane. Workbook Backpack 5. New York: Pearson Longman, 2005. Text.

Gaya Turabian

Harrera, Mario, Pinkley, Diane. Workbook Backpack 5. New York: Pearson Longman, 2005. Print.