Παραπομπή σε μορφή APA (7η εκδ.)

Birdsall, S. S., & Florin, J. W. (1992). Regional landscapes of the United States and Canada (4th ed.). John Wiley and Sons.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Birdsall, Stephen S., και John William Florin. Regional Landscapes of the United States and Canada. 4th ed. New York: John Wiley and Sons, 1992.

Παραπομπή σε μορφή MLA (9th εκδ.)

Birdsall, Stephen S., και John William Florin. Regional Landscapes of the United States and Canada. 4th ed. John Wiley and Sons, 1992.