Volpe, E. P., & Rosenbaum, P. A. (2000). Understanding evolution (6th ed.). McGraw-Hill.
Cita Chicago (17th ed.)Volpe, E Peter, i Peter Andrew Rosenbaum. Understanding Evolution. 6th ed. Boston: McGraw-Hill, 2000.
Cita MLA (9th ed.)Volpe, E Peter, i Peter Andrew Rosenbaum. Understanding Evolution. 6th ed. McGraw-Hill, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.