APA Citatie

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

Chicago Style citaat

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

MLA citatie

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

Let op: Deze citaties zijn niet altijd 100% accuraat.