Purpura, J. (1996). Modeling relationships between test takers' reported cognitive and metacognitive strategy use and performance on language tests. University of California, Los Angeles.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Purpura, James. Modeling Relationships Between Test Takers' Reported Cognitive and Metacognitive Strategy Use and Performance on Language Tests. California: University of California, Los Angeles, 1996.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Purpura, James. Modeling Relationships Between Test Takers' Reported Cognitive and Metacognitive Strategy Use and Performance on Language Tests. University of California, Los Angeles, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.