Não informado. (1967). Journal of Educational Thought. University of Calgary, Faculty of Education.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Journal of Educational Thought. Calgary, Canada: University of Calgary, Faculty of Education, 1967.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Journal of Educational Thought. University of Calgary, Faculty of Education, 1967.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.