APA (7th ed.) Citation

Hobbs, M., & Julia Starr Keddle. (2006). Commerce 1: Teacher's resource book. Oxford University Press.

Chicago Style (17th ed.) Citation

Hobbs, Martyn, and Julia Starr Keddle. Commerce 1: Teacher's Resource Book. New York: Oxford University Press, 2006.

MLA (8th ed.) Citation

Hobbs, Martyn, and Julia Starr Keddle. Commerce 1: Teacher's Resource Book. Oxford University Press, 2006.