Cita APA

Stanley, S. M., & Stanley, S. M. (1989). Earth and life through time (2. edition.). New York, New York: W.H. Freeman.

Citación estilo Chicago

Stanley, Steven M., y Steven M. Stanley. Earth and Life Through Time. 2. edition. New York, New York: W.H. Freeman, 1989.

Cita MLA

Stanley, Steven M., y Steven M. Stanley. Earth and Life Through Time. 2. edition. New York, New York: W.H. Freeman, 1989.