Heidel, W. A. (1933). The heroic age of science: The conception, ideals, and methods of science among the ancient Greeks. Pub. for Carnegie institution of Washington by the Williams & Wilkins company.
Chicago-referens (17:e uppl.)Heidel, William Arthur. The Heroic Age of Science: The Conception, Ideals, and Methods of Science Among the Ancient Greeks. Baltimore: Pub. for Carnegie institution of Washington by the Williams & Wilkins company, 1933.
MLA-referens (8:e uppl.)Heidel, William Arthur. The Heroic Age of Science: The Conception, Ideals, and Methods of Science Among the Ancient Greeks. Pub. for Carnegie institution of Washington by the Williams & Wilkins company, 1933.
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