Não informado. (1948). Education. Department of Education, School Publications Branch.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Education. Wellington: Department of Education, School Publications Branch, 1948.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Education. Department of Education, School Publications Branch, 1948.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.