Não informado. (1980). Proceedings of the National Academy of Sciences of the United States of America. National Academy of Sciences.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Proceedings of the National Academy of Sciences of the United States of America. Washington: National Academy of Sciences, 1980.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Proceedings of the National Academy of Sciences of the United States of America. National Academy of Sciences, 1980.
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