Cita APA (7th ed.)
Freeman, S. (2002). Biologica Science. Prentice hall.
Cita Chicago (17th ed.)
Freeman, Scott. Biologica Science. New Jersey: Prentice hall, 2002.
Cita MLA (9th ed.)
Freeman, Scott. Biologica Science. Prentice hall, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.