Gabler, R. E. (1982). Essentials of physical geography. Sounders College Publ.
Chicago (17e ed.) BronvermeldingGabler, Robert E. Essentials of Physical Geography. Sounders College Publ, 1982.
MLA (8e ed.) BronvermeldingGabler, Robert E. Essentials of Physical Geography. Sounders College Publ, 1982.
Let op: Deze citaties zijn niet altijd 100% accuraat.