Cita APA (7a ed.)

Boehm, R. G., Armstrong, D. G., & Hunkins, . F. P. (2000). Geography: The world and its people. Glencoe/McGraw Hill.

Cita Chicago Style (17a ed.)

Boehm, Richard G., David G. Armstrong, y Francis P. Hunkins. Geography: The World and Its People. Westerville, Ohio : New York: Glencoe/McGraw Hill, 2000.

Cita MLA (8a ed.)

Boehm, Richard G., et al. Geography: The World and Its People. Glencoe/McGraw Hill, 2000.