Não informado. (1956). Minnesota Studies in the Philosophy of Science. Minnesota Center of Philosophy of Science.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Minnesota Studies in the Philosophy of Science. Minneapolis, Minn: Minnesota Center of Philosophy of Science, 1956.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Minnesota Studies in the Philosophy of Science. Minnesota Center of Philosophy of Science, 1956.
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