Salgado, A. M. (2003). Introductory principles and processes of biology. Mutya Pub. House.
Lua i Stíl Chicago (17ú heag.)Salgado, Arnel Ma. Introductory Principles and Processes of Biology. Valenzuela City: Mutya Pub. House, 2003.
Lua MLA (9ú heag.)Salgado, Arnel Ma. Introductory Principles and Processes of Biology. Mutya Pub. House, 2003.
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