Cita APA

Spencer, E. W. (2003). Earth science: Understanding environmental systems. McGraw - Hill.

Citación estilo Chicago

Spencer, Edgar W. Earth Science: Understanding Environmental Systems. Boston: McGraw - Hill, 2003.

Cita MLA

Spencer, Edgar W. Earth Science: Understanding Environmental Systems. McGraw - Hill, 2003.

Warning: These citations may not always be 100% accurate.