Eckersley, C. (1963). Essential english for foreign students: Book four: teacher's book. Longman Group.
Style de citation Chicago (17e éd.)Eckersley, C.E. Essential English for Foreign Students: Book Four: Teacher's Book. London: Longman Group, 1963.
Style de citation MLA (9e éd.)Eckersley, C.E. Essential English for Foreign Students: Book Four: Teacher's Book. Longman Group, 1963.
Attention : ces citations peuvent ne pas être correctes à 100%.