Gaya APA

Beitz, D, C., Bauer, J, E. (). E-book Your Dog's Nutritional Needs : A Science-Based Guide For Pet Owners . USA: National Research Council.

Gaya MLA

Beitz, Donald, C.., Bauer, John, E.. "E-book Your Dog's Nutritional Needs : A Science-Based Guide For Pet Owners". USA: National Research Council, . Text.