Cita APA (7th ed.)
Boehm, R. G., James L. Swanson, & Robbert Bednarz. (1995). World Geography: A physical and cultural approach. Glencoe/ McGraw-Hill.
Cita Chicago (17th ed.)
Boehm, Richard G., James L. Swanson, i Robbert Bednarz. World Geography: A Physical and Cultural Approach. New York: Glencoe/ McGraw-Hill, 1995.
Cita MLA (9th ed.)
Boehm, Richard G., et al. World Geography: A Physical and Cultural Approach. Glencoe/ McGraw-Hill, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.