Case, E. C., & Bergsmark, D. R. (1940). College geography (2nd ed.). J. Wiley and Sons.
Chicago Style aipamenaCase, Earl Clark, and Daniel R. Bergsmark. College Geography. 2nd ed. New York: J. Wiley and Sons, 1940.
MLA aipamenaCase, Earl Clark, and Daniel R. Bergsmark. College Geography. 2nd ed. J. Wiley and Sons, 1940.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.