O'Dell, A. (1967). Geography: Our earth and its people. Grolier.
Chicago Style aipamenaO'Dell, A.C. Geography: Our Earth and Its People. London: Grolier, 1967.
MLA aipamenaO'Dell, A.C. Geography: Our Earth and Its People. Grolier, 1967.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.