Tohutoro APA (7th ed.)
Piel, J. Scientific American: Science in the 20th Century : Special Issue : Vol. 3, Number 1, 1991. Scientific American.
Tohutoru Kātū Chicago (17th ed.)
Piel, Jonathan. Scientific American: Science in the 20th Century : Special Issue : Vol. 3, Number 1, 1991. Nueva York, EUA: Scientific American.
Tohutoro MLA (9th ed.)
Piel, Jonathan. Scientific American: Science in the 20th Century : Special Issue : Vol. 3, Number 1, 1991. Scientific American.
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