APA (7th ed.) Zitazioa

ECKERSLEY, C. (1970). Essential English for foreign students: ECKERSLEY, C.E. Longman.

Chicago Style (17th ed.) Zitazioa

ECKERSLEY, C.E. Essential English for Foreign Students: ECKERSLEY, C.E. London: Longman, 1970.

MLA (9th ed.) Zitazioa

ECKERSLEY, C.E. Essential English for Foreign Students: ECKERSLEY, C.E. Longman, 1970.