APA Style

Herrera, Mario, Pinkley, Diane. (2006). Backpack British English . Madrid: 123 Publishing House.

Chicago Style

Herrera, Mario, Pinkley, Diane. Backpack British English. Madrid: 123 Publishing House, 2006. Book.

MLA Style

Herrera, Mario, Pinkley, Diane. Backpack British English. Madrid: 123 Publishing House, 2006. Book.

Turabian Style

Herrera, Mario, Pinkley, Diane. Backpack British English. Madrid: 123 Publishing House, 2006. Book.