Cita APA (7a ed.)

Lee, W. R. (1971). The dolphin english course: Teacher's book 3. Oxford University Press.

Cita Chicago Style (17a ed.)

Lee, W. R. The Dolphin English Course: Teacher's Book 3. London: Oxford University Press, 1971.

Cita MLA (9a ed.)

Lee, W. R. The Dolphin English Course: Teacher's Book 3. Oxford University Press, 1971.