Cita APA (7a ed.)

Stanley, S. M. (1993). Exploring earth and life througt time. W. H. Freeman.

Cita Chicago Style (17a ed.)

Stanley, Steven M. Exploring Earth and Life Througt Time. New York: W. H. Freeman, 1993.

Cita MLA (8a ed.)

Stanley, Steven M. Exploring Earth and Life Througt Time. W. H. Freeman, 1993.