Cita APA (7a ed.)

Gethin, R., & Mackin, R. (1969). English studies series. Oxford University Press.

Cita Chicago Style (17a ed.)

Gethin, R.H, y Ronald Mackin. English Studies Series. London: Oxford University Press, 1969.

Cita MLA (9a ed.)

Gethin, R.H, y Ronald Mackin. English Studies Series. Oxford University Press, 1969.