Chisholm, M. (1970). Geography and Economics (2nd ed.). Bell & Sons.
Chicago Style (17th ed.) ZitazioaChisholm, Michael. Geography and Economics. 2nd ed. London: Bell & Sons, 1970.
MLA (9th ed.) ZitazioaChisholm, Michael. Geography and Economics. 2nd ed. Bell & Sons, 1970.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.