(1995). Above the Rockies: Through digital eyes ; Heart of the Rockies 1:2 847 000 = Heart of the Rockies. National Geographic Society.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAbove the Rockies: Through Digital Eyes ; Heart of the Rockies 1:2 847 000 = Heart of the Rockies. Washington: National Geographic Society, 1995.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAbove the Rockies: Through Digital Eyes ; Heart of the Rockies 1:2 847 000 = Heart of the Rockies. National Geographic Society, 1995.
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