Παραπομπή σε μορφή APA (7η εκδ.)

Birdsall, S. S., & Florin, J. (1992). Outline of american geography: Regional landscapes of the united states (Fourth edition.). John Wiley.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Birdsall, Stephen S., και John Florin. Outline of American Geography: Regional Landscapes of the United States. Fourth edition. New York: John Wiley, 1992.

Παραπομπή σε μορφή MLA (9th εκδ.)

Birdsall, Stephen S., και John Florin. Outline of American Geography: Regional Landscapes of the United States. Fourth edition. John Wiley, 1992.