Zavala-Cruz, G. G. (2008). A university view: PH livelihood in the chemical balance for cell lifespan. Universidad Autónoma de Tamaulipas.
Čikaški stil citiranja (17. izdanje)Zavala-Cruz, Gad Gamed. A University View: PH Livelihood in the Chemical Balance for Cell Lifespan. Universidad Autónoma de Tamaulipas, 2008.
MLA način citiranja (8. izdanje)Zavala-Cruz, Gad Gamed. A University View: PH Livelihood in the Chemical Balance for Cell Lifespan. Universidad Autónoma de Tamaulipas, 2008.
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