Dyfyniad APA

Johnson, M. D. (2006). Human biology: Concepts and current issues (3rd edition.). Pearson/Benjamin Cummings.

Dyfyniad Arddull Chicago

Johnson, Michael D. Human Biology: Concepts and Current Issues. 3rd edition. San Francisco, Calif: Pearson/Benjamin Cummings, 2006.

Dyfyniad MLA

Johnson, Michael D. Human Biology: Concepts and Current Issues. 3rd edition. Pearson/Benjamin Cummings, 2006.

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