APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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