Cita APA (7th ed.)

Gardner, B., & Gardner, F. (2000). Classroom english (First edition.). Oxford University Press.

Cita Chicago (17th ed.)

Gardner, Bryan, i Felicity Gardner. Classroom English. First edition. Oxford: Oxford University Press, 2000.

Cita MLA (9th ed.)

Gardner, Bryan, i Felicity Gardner. Classroom English. First edition. Oxford University Press, 2000.