Não informado. (1968). Journal of Educational Administration and History. University of Leeds, Museum of Education.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Journal of Educational Administration and History. Leeds, Inglaterra: University of Leeds, Museum of Education, 1968.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Journal of Educational Administration and History. University of Leeds, Museum of Education, 1968.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.