APA
Mackin R., . (1967). A course in spoken english : Texts, drills and tests. Oxford University Press, London: .
Chicago
Mackin Ronald, . 1967. A course in spoken english : Texts, drills and tests. Oxford University Press, London: .
Harvard
Mackin R., . (1967). A course in spoken english : Texts, drills and tests. Oxford University Press, London: .
MLA
Mackin Ronald, . A course in spoken english : Texts, drills and tests. Oxford University Press, London: . 1967.