Cita APA (7th ed.)

Johnson, G. B. (1994). Human biology: Exploring concepts. WCB.

Cita Chicago (17th ed.)

Johnson, George B. Human Biology: Exploring Concepts. Iowa: WCB, 1994.

Cita MLA (9th ed.)

Johnson, George B. Human Biology: Exploring Concepts. WCB, 1994.