Robertson, L., & Squires, D. B. (1999). Southern Rocky Mountain wildflowers: A field guide to common wildflowers, shrubs, and trees. Falcon ; Rocky Mountain Nature Association.
Chicago Style (17th ed.) CitationRobertson, Leigh, and Duane B. Squires. Southern Rocky Mountain Wildflowers: A Field Guide to Common Wildflowers, Shrubs, and Trees. Helena, Mont. : [Estes Park, Colo.]: Falcon ; Rocky Mountain Nature Association, 1999.
MLA (9th ed.) CitationRobertson, Leigh, and Duane B. Squires. Southern Rocky Mountain Wildflowers: A Field Guide to Common Wildflowers, Shrubs, and Trees. Falcon ; Rocky Mountain Nature Association, 1999.
Warning: These citations may not always be 100% accurate.