Spencer, E. W. (2003). Earth science: Understanding environmental systems. McGraw-Hill.
Stile di citazione ChicagoSpencer, Edgar Winston. Earth Science: Understanding Environmental Systems. McGraw-Hill, 2003.
Citazione MLASpencer, Edgar Winston. Earth Science: Understanding Environmental Systems. McGraw-Hill, 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.