APA (7th ed.) Zitazioa

CAMPBELL, R. (1938). English composition for foreign students. Longman.

Chicago Style (17th ed.) Zitazioa

CAMPBELL, R.R. English Composition for Foreign Students. London: Longman, 1938.

MLA (9th ed.) Zitazioa

CAMPBELL, R.R. English Composition for Foreign Students. Longman, 1938.