Cita APA (7a ed.)

Skehan, P. (1989). Individual differences in second-language learning. Arnold.

Cita Chicago Style (17a ed.)

Skehan, Peter. Individual Differences in Second-language Learning. London [etc.]: Arnold, 1989.

Cita MLA (9a ed.)

Skehan, Peter. Individual Differences in Second-language Learning. Arnold, 1989.