APA (7th ed.) Zitazioa

JESPERSON, O. (1933). Essentials of English grammar. Allen and Unwin.

Chicago Style (17th ed.) Zitazioa

JESPERSON, Otto. Essentials of English Grammar. London: Allen and Unwin, 1933.

MLA (9th ed.) Zitazioa

JESPERSON, Otto. Essentials of English Grammar. Allen and Unwin, 1933.