Não informado. University of Iowa studies in education. University of Iowa, College of Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. University of Iowa Studies in Education. Iowa City, Iowa: University of Iowa, College of Education.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. University of Iowa Studies in Education. University of Iowa, College of Education.
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