Robertson, L., & Kassar, C. (2015). Southern Rocky Mountain wildflowers: A field guide to wildflowers in the Southern Rocky Mountains, including Rocky Mountain National Park (Second edition.). FalconGuides.
Chicago Style (17th ed.) CitationRobertson, Leigh, and Chris Kassar. Southern Rocky Mountain Wildflowers: A Field Guide to Wildflowers in the Southern Rocky Mountains, Including Rocky Mountain National Park. Second edition. Guilford, Connecticut: FalconGuides, 2015.
MLA (8th ed.) CitationRobertson, Leigh, and Chris Kassar. Southern Rocky Mountain Wildflowers: A Field Guide to Wildflowers in the Southern Rocky Mountains, Including Rocky Mountain National Park. Second edition. FalconGuides, 2015.
Warning: These citations may not always be 100% accurate.