Παραπομπή σε μορφή APA (7η εκδ.)

Powell, J. W., & Brandt, A. (2002). The exploration of the Colorado River and its canyons. National Geographic.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Powell, John Wesley, και Anthony Brandt. The Exploration of the Colorado River and Its Canyons. Washington, D.C.: National Geographic, 2002.

Παραπομπή σε μορφή MLA (8th εκδ.)

Powell, John Wesley, και Anthony Brandt. The Exploration of the Colorado River and Its Canyons. National Geographic, 2002.