Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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