APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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