Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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