Παραπομπή σε μορφή APA (7η εκδ.)

Henry, M., & Armstrong, L. (2004). Mapping the future of America's national parks: Stewardship through geographic information systems. ESRI Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Henry, Mark, και Leslie Armstrong. Mapping the Future of America's National Parks: Stewardship Through Geographic Information Systems. Redlands, California: ESRI Press, 2004.

Παραπομπή σε μορφή MLA (8th εκδ.)

Henry, Mark, και Leslie Armstrong. Mapping the Future of America's National Parks: Stewardship Through Geographic Information Systems. ESRI Press, 2004.