Cita APA (7a ed.)

Clifford, T. (2009). Rourke's World of Science ENCYCLOPEDIA: Volume 4 - Earth Science. Rourke Publishing.

Cita Chicago Style (17a ed.)

Clifford, Tim. Rourke's World of Science ENCYCLOPEDIA: Volume 4 - Earth Science. Rourke Publishing, 2009.

Cita MLA (8a ed.)

Clifford, Tim. Rourke's World of Science ENCYCLOPEDIA: Volume 4 - Earth Science. Rourke Publishing, 2009.