Cita APA (7th ed.)

Allen, J. P. B., & Widdowson, H. G. (1978). English in social studies (Teacher's ed.). Oxford University Press.

Cita Chicago (17th ed.)

Allen, J. P. B., i H. G. Widdowson. English in Social Studies. Teacher's ed. Oxford: Oxford University Press, 1978.

Cita MLA (8th ed.)

Allen, J. P. B., i H. G. Widdowson. English in Social Studies. Teacher's ed. Oxford University Press, 1978.