Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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