Cita APA (7th ed.)

Robert C. Gardner & Lambert, W. E. (1972). Attitudes and motivation in second-language learning. Newbury House Pub.

Cita Chicago (17th ed.)

Robert C. Gardner i Wallace E. Lambert. Attitudes and Motivation in Second-language Learning. Rowley, Mass: Newbury House Pub, 1972.

Cita MLA (9th ed.)

Robert C. Gardner i Wallace E. Lambert. Attitudes and Motivation in Second-language Learning. Newbury House Pub, 1972.