Citazione Stile APA (7a Edizione)

Levin, J. R. (1977). Learner differences: Diagnosis and prescription. Holt, Rinehart and Winston.

Citazione stile Chigago Style (17a edizione)

Levin, Joel R. Learner Differences: Diagnosis and Prescription. New York: Holt, Rinehart and Winston, 1977.

Citatione MLA (9a ed.)

Levin, Joel R. Learner Differences: Diagnosis and Prescription. Holt, Rinehart and Winston, 1977.