APA aipamena

Dunbar, C. O., & Rodgers, J. Principles of stratigraphy.

Chicago Style aipamena

Dunbar, Carl O., and John Rodgers. Principles of Stratigraphy.

MLA aipamena

Dunbar, Carl O., and John Rodgers. Principles of Stratigraphy.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.