Não informado. (1967). Journal of research and development in education. University of Georgia, College of Education.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Journal of Research and Development in Education. Athens, Ga: University of Georgia, College of Education, 1967.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Journal of Research and Development in Education. University of Georgia, College of Education, 1967.
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