APA (7th ed.) Zitazioa

CLARKE, D. W. (1957). Modern English practice: ; exercises in English. Longman.

Chicago Style (17th ed.) Zitazioa

CLARKE, D. Waldo. Modern English Practice: ; Exercises in English. London: Longman, 1957.

MLA (9th ed.) Zitazioa

CLARKE, D. Waldo. Modern English Practice: ; Exercises in English. Longman, 1957.