Cita APA (7th ed.)

Stansfield , C. A., & Zimolzak, C. E. (1982). World regions: Changing interaction s. Charles E. Merrill.

Cita Chicago (17th ed.)

Stansfield , Charles A., i Chester E. Zimolzak. World Regions: Changing Interaction S. Columbus Ohio: Charles E. Merrill, 1982.

Cita MLA (9th ed.)

Stansfield , Charles A., i Chester E. Zimolzak. World Regions: Changing Interaction S. Charles E. Merrill, 1982.