Cita APA

Spencer, E. W., & Spencer, E. W. (1983). Physical geology. Rowley, Mass.: Addison-Wesley.

Citación estilo Chicago

Spencer, Edgar Winston, y Edgar Winston Spencer. Physical Geology. Rowley, Mass.: Addison-Wesley, 1983.

Cita MLA

Spencer, Edgar Winston, y Edgar Winston Spencer. Physical Geology. Rowley, Mass.: Addison-Wesley, 1983.

Precaución: Estas citas no son 100% exactas.