NEBERGEL, W. H. (1957). College Chemistry Oleh William H. Nebergel And Frederick C. Schmidt. D.C. Heat and Company.
Lua i Stíl Chicago (17ú heag.)NEBERGEL, William H. College Chemistry Oleh William H. Nebergel And Frederick C. Schmidt. D.C. Heat and Company, 1957.
Lua MLA (8ú heag.)NEBERGEL, William H. College Chemistry Oleh William H. Nebergel And Frederick C. Schmidt. D.C. Heat and Company, 1957.
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