APA
Mackin R., . (1966). Exercises in english patterns and usage. Oxford University Press, London: .
Chicago
Mackin Ronald, . 1966. Exercises in english patterns and usage. Oxford University Press, London: .
Harvard
Mackin R., . (1966). Exercises in english patterns and usage. Oxford University Press, London: .
MLA
Mackin Ronald, . Exercises in english patterns and usage. Oxford University Press, London: . 1966.