APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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