Παραπομπή σε μορφή APA (7η εκδ.)

Purpura, J. E. (1999). Learner strategy use and performance on language tests: A structural equation modeling approach. Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Purpura, James E. Learner Strategy Use and Performance on Language Tests: A Structural Equation Modeling Approach. Cambridge: Cambridge University Press, 1999.

Παραπομπή σε μορφή MLA (8th εκδ.)

Purpura, James E. Learner Strategy Use and Performance on Language Tests: A Structural Equation Modeling Approach. Cambridge University Press, 1999.