APA (7th ed.) Citation

Lee, W. R. (1973). The dolphin english course: Teacher's book 4. Oxford University Press.

Chicago Style (17th ed.) Citation

Lee, W. R. The Dolphin English Course: Teacher's Book 4. London: Oxford University Press, 1973.

MLA (9th ed.) Citation

Lee, W. R. The Dolphin English Course: Teacher's Book 4. Oxford University Press, 1973.