Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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