Cita APA (7a ed.)

Lee, W. R. (1970). The dolphin english course: Teacher's book 1. Oxford University Press.

Cita Chicago Style (17a ed.)

Lee, W. R. The Dolphin English Course: Teacher's Book 1. London: Oxford University Press, 1970.

Cita MLA (9a ed.)

Lee, W. R. The Dolphin English Course: Teacher's Book 1. Oxford University Press, 1970.