Hartley, B. (1985). Streamline english: Departures, part A: units l-40 (9a. ed.). Oxford University Press.
Chicago Style (17. basım) AtıfHartley, Bernard. Streamline English: Departures, Part A: Units L-40. 9a. ed. New York: Oxford University Press, 1985.
MLA (9th ed.) AtıfHartley, Bernard. Streamline English: Departures, Part A: Units L-40. 9a. ed. Oxford University Press, 1985.
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