Cita APA

C.Plummer Charles, & H.Carlson Diane. (2003). Physical Geology. American: McGraw -Hill.

Citación estilo Chicago

C.Plummer Charles, y H.Carlson Diane. Physical Geology. American: McGraw -Hill, 2003.

Cita MLA

C.Plummer Charles, y H.Carlson Diane. Physical Geology. American: McGraw -Hill, 2003.