CLARKE, D. W. (1957). Modern English practice: ; exercises in English. Longman.
Cita Chicago (17th ed.)CLARKE, D. Waldo. Modern English Practice: ; Exercises in English. London: Longman, 1957.
Cita MLA (9th ed.)CLARKE, D. Waldo. Modern English Practice: ; Exercises in English. Longman, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.