Cita APA (7a ed.)

Perren, G. E. (1972). Teachers of English as a second language: Their training and preparation. English Language Book Society and Cambridge University Press.

Cita Chicago Style (17a ed.)

Perren, G. E. Teachers of English as a Second Language: Their Training and Preparation. Cambridge: English Language Book Society and Cambridge University Press, 1972.

Cita MLA (9a ed.)

Perren, G. E. Teachers of English as a Second Language: Their Training and Preparation. English Language Book Society and Cambridge University Press, 1972.