APA Style

Mercado, E, H, &, B, S, A. (2015). Environmental science concepts : a simple approach . Puerto Princesa, Palawan: EHM Publishing House.

MLA Style

Mercado, Enrico, H., &, Bonagua,, Sonia, A.. "Environmental science concepts : a simple approach". Puerto Princesa, Palawan: EHM Publishing House, 2015. PRINT (Text).