Dyfyniad APA

Simpson, G. G. Principles of animal taxonomy. Oxford book company.

Dyfyniad Arddull Chicago

Simpson, George Gaylord. Principles of Animal Taxonomy. New Delhi: Oxford book company.

Dyfyniad MLA

Simpson, George Gaylord. Principles of Animal Taxonomy. Oxford book company.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.