Cita APA (7th ed.)
Wheeler, J. H., & Kostbade, J. T. (1990). World regional geography. Saunders College Pub..
Cita Chicago (17th ed.)
Wheeler, Jesse H., i J. Trenton Kostbade. World Regional Geography. Philadelphia: Saunders College Pub., 1990.
Cita MLA (9th ed.)
Wheeler, Jesse H., i J. Trenton Kostbade. World Regional Geography. Saunders College Pub., 1990.
Atenció: Aquestes cites poden no estar 100% correctes.