(1995). Above the Rockies: Through digital eyes ; Heart of the Rockies 1:2 847 000 = Heart of the Rockies. National Geographic Society.
Lua i Stíl Chicago (17ú heag.)Above the Rockies: Through Digital Eyes ; Heart of the Rockies 1:2 847 000 = Heart of the Rockies. Washington: National Geographic Society, 1995.
Lua MLA (9ú heag.)Above the Rockies: Through Digital Eyes ; Heart of the Rockies 1:2 847 000 = Heart of the Rockies. National Geographic Society, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.