Dyfyniad APA

Johnson, G. B. (1994). Human biology: Explaining concepts. Wm. C. Brown.

Dyfyniad Arddull Chicago

Johnson, George B. Human Biology: Explaining Concepts. Dubuque, Iowa: Wm. C. Brown, 1994.

Dyfyniad MLA

Johnson, George B. Human Biology: Explaining Concepts. Wm. C. Brown, 1994.

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