Cita APA (7a ed.)

Perren, G. E. (1968). Teachers of English as a second language: Their training and preparation. Cambridge University Press.

Cita Chicago Style (17a ed.)

Perren, G. E. Teachers of English as a Second Language: Their Training and Preparation. London: Cambridge University Press, 1968.

Cita MLA (8a ed.)

Perren, G. E. Teachers of English as a Second Language: Their Training and Preparation. Cambridge University Press, 1968.