Purpura, J. E. (1999). Learner strategy use and performance on language tests: A structural equation modeling approach. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPurpura, James E. Learner Strategy Use and Performance on Language Tests: A Structural Equation Modeling Approach. Cambridge: Cambridge University Press, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPurpura, James E. Learner Strategy Use and Performance on Language Tests: A Structural Equation Modeling Approach. Cambridge University Press, 1999.
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