Spiegel, L. (1915). Chemical constitution and physiological action. Van Nostrand.
Lua i Stíl Chicago (17ú heag.)Spiegel, Leopold. Chemical Constitution and Physiological Action. New York: Van Nostrand, 1915.
Lua MLA (8ú heag.)Spiegel, Leopold. Chemical Constitution and Physiological Action. Van Nostrand, 1915.
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