APA aipamena

Longwell, C. R., & Flint, R. F. Introduction to physical geology (6th ed.).

Chicago Style aipamena

Longwell, Chester R., and Richard F. Flint. Introduction to Physical Geology. 6th ed.

MLA aipamena

Longwell, Chester R., and Richard F. Flint. Introduction to Physical Geology. 6th ed.