Dyfyniad APA

 Relethford, J. (2008).  The human species: An introduction to biological anthropology.  McGraw-Hill.

Dyfyniad Arddull Chicago

 Relethford, John.  The Human Species: An Introduction to Biological Anthropology.  McGraw-Hill, 2008.

Dyfyniad MLA

 Relethford, John.  The Human Species: An Introduction to Biological Anthropology.  McGraw-Hill, 2008.

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