APA (7e ed.) Bronvermelding

Plummer, C. C., Carlson, D. H., & Hammersley, L. (2016). Physical geology (Fifteenth edition, International edition.). McGraw-Hill/Education, Inc.

Chicago (17e ed.) Bronvermelding

Plummer, Charles C., Diane H. Carlson, en Lisa Hammersley. Physical Geology. Fifteenth edition, International edition. New York, NY: McGraw-Hill/Education, Inc, 2016.

MLA (9e ed.) Bronvermelding

Plummer, Charles C., et al. Physical Geology. Fifteenth edition, International edition. McGraw-Hill/Education, Inc, 2016.