APA (7th ed.) Citation

ALLEN, G. C. (1990). Physical geology - Gary C. Allen, Sheldon Judson, Marvin E. Kauffman. Englewood Cliff.

Chicago Style (17th ed.) Citation

ALLEN, Gary C. Physical Geology - Gary C. Allen, Sheldon Judson, Marvin E. Kauffman. Englewood Cliff, 1990.

MLA (8th ed.) Citation

ALLEN, Gary C. Physical Geology - Gary C. Allen, Sheldon Judson, Marvin E. Kauffman. Englewood Cliff, 1990.

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