Não informado. (1928). American school and university. Educational Division of North American.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. American School and University. Philadelphia, Pa: Educational Division of North American, 1928.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. American School and University. Educational Division of North American, 1928.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.