Cita APA (7th ed.)
Johnson, M. D. (2000). Human biology: Concepts and current issues. Benjamin Cummings.
Cita Chicago (17th ed.)
Johnson, Michael D. Human Biology: Concepts and Current Issues. San Francisco: Benjamin Cummings, 2000.
Cita MLA (9th ed.)
Johnson, Michael D. Human Biology: Concepts and Current Issues. Benjamin Cummings, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.