Não informado. Smithsonian opportunities for research and study in history, art, science. Smithsonian Institution, Board of Academic Studies.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Smithsonian Opportunities for Research and Study in History, Art, Science. Washington: Smithsonian Institution, Board of Academic Studies.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Smithsonian Opportunities for Research and Study in History, Art, Science. Smithsonian Institution, Board of Academic Studies.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.