Não informado. (2012). The American Journal of Distance Education. Pennsylvania State University, College of Education, Office for Distance Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The American Journal of Distance Education. University Park, Pa: Pennsylvania State University, College of Education, Office for Distance Education, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The American Journal of Distance Education. Pennsylvania State University, College of Education, Office for Distance Education, 2012.
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