Gaya APA

D.Klaassen, C., Watkins, J, B. (2010). Casarett & Doull's Essentials of Toxicology . : Mc Graw Hill.

Gaya MLA

D.Klaassen, Curtis., Watkins, John, B.. "Casarett & Doull's Essentials of Toxicology". : Mc Graw Hill, 2010. Text.