APA
Thomson A., Martinet A., . (1964). A practical English grammar for foreign students exercises 6 : indirect speech and passive voice. London: Oxford Univ. Press.
Chicago
Thomson A.J, Martinet A.V, . 1964. A practical English grammar for foreign students exercises 6 : indirect speech and passive voice. London: Oxford Univ. Press.
Harvard
Thomson A., Martinet A., . (1964). A practical English grammar for foreign students exercises 6 : indirect speech and passive voice. London: Oxford Univ. Press.
MLA
Thomson A.J, Martinet A.V, . A practical English grammar for foreign students exercises 6 : indirect speech and passive voice. London: Oxford Univ. Press. 1964.