Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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