Flint, R. F., & Skinner, B. J. (1977). Physical geology (2nd ed.). Wiley.
Chicago Style aipamenaFlint, Richard Foster, and Brian J. Skinner. Physical Geology. 2nd ed. New York: Wiley, 1977.
MLA aipamenaFlint, Richard Foster, and Brian J. Skinner. Physical Geology. 2nd ed. Wiley, 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.