Spencer, E. W. (2003). Earth science: Understanding environmental systems. McGraw - Hill.
Style de citation Chicago (17e éd.)Spencer, Edgar W. Earth Science: Understanding Environmental Systems. Boston: McGraw - Hill, 2003.
Style de citation MLA (9e éd.)Spencer, Edgar W. Earth Science: Understanding Environmental Systems. McGraw - Hill, 2003.
Attention : ces citations peuvent ne pas être correctes à 100%.