APA (7th ed.) Citation

Hartley, B. (1984). Streamline english: Departures, part B: units 41-80 (5a. ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Hartley, Bernard. Streamline English: Departures, Part B: Units 41-80. 5a. ed. New York: Oxford University Press, 1984.

MLA (9th ed.) Citation

Hartley, Bernard. Streamline English: Departures, Part B: Units 41-80. 5a. ed. Oxford University Press, 1984.