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