Cita APA

Sapp, J., & Jan Sapp. (1999). What is natural?: Coral reef crisis. New York: Oxford University Press.

Chicago Style Citation

Sapp, Jan, i Jan Sapp. What Is Natural?: Coral Reef Crisis. New York: Oxford University Press, 1999.

Cita MLA

Sapp, Jan, i Jan Sapp. What Is Natural?: Coral Reef Crisis. New York: Oxford University Press, 1999.