Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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