DUNBAR, C. O. a. R. (1957). Principles of stratigraphy. John Wiley.
Chicago Style (17th ed.) ZitazioaDUNBAR, Carl O. and RODGERS. Principles of Stratigraphy. New York: John Wiley, 1957.
MLA (9th ed.) ZitazioaDUNBAR, Carl O. and RODGERS. Principles of Stratigraphy. John Wiley, 1957.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.