Schiefer, H. B. (1997). Understanding toxicology chemicals, their benefit and risksH. Bruno Schiefer, Donald G. Irvine, Shirley C. Buzik. CRC.
Lua i Stíl Chicago (17ú heag.)Schiefer, H. Bruno. Understanding Toxicology Chemicals, Their Benefit and RisksH. Bruno Schiefer, Donald G. Irvine, Shirley C. Buzik. CRC, 1997.
Lua MLA (8ú heag.)Schiefer, H. Bruno. Understanding Toxicology Chemicals, Their Benefit and RisksH. Bruno Schiefer, Donald G. Irvine, Shirley C. Buzik. CRC, 1997.
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