Boehm, R. G. (1995). Glencoe world geography: A physical and cultural approach (4th ed.). Glencoe.
Dyfyniad Arddull ChicagoBoehm, Richard G. Glencoe World Geography: A Physical and Cultural Approach. 4th ed. New York: Glencoe, 1995.
Dyfyniad MLABoehm, Richard G. Glencoe World Geography: A Physical and Cultural Approach. 4th ed. Glencoe, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.