APA (7th ed.) Citation

Barker, J. W. (1960). Teach yourself portuguese. English University Press.

Chicago Style (17th ed.) Citation

Barker, John William. Teach Yourself Portuguese. London: English University Press, 1960.

MLA (8th ed.) Citation

Barker, John William. Teach Yourself Portuguese. English University Press, 1960.

Warning: These citations may not always be 100% accurate.