Heise, S. (2022). Hiking Colorado: A guide to the state's greatest hiking adventures (Fifth edition.). Falcon Guides.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHeise, Sandy. Hiking Colorado: A Guide to the State's Greatest Hiking Adventures. Fifth edition. Guilford, Connecticut: Falcon Guides, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHeise, Sandy. Hiking Colorado: A Guide to the State's Greatest Hiking Adventures. Fifth edition. Falcon Guides, 2022.
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