Boehm, R. G. (1995). Glencoe world geography: A physical and cultural approach (Texas ed.). New York: Glencoe/McGraw-Hill.
Chicago Style aipamenaBoehm, Richard G. Glencoe World Geography: A Physical and Cultural Approach. Texas ed. New York: Glencoe/McGraw-Hill, 1995.
MLA aipamenaBoehm, Richard G. Glencoe World Geography: A Physical and Cultural Approach. Texas ed. New York: Glencoe/McGraw-Hill, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.