Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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