APA (7th ed.) Citation

Longyear, B. O. (1927). Trees and shrubs of the Rocky Mountain Region: With keys and descriptions for their identification. Putnam.

Chicago Style (17th ed.) Citation

Longyear, Burton O. Trees and Shrubs of the Rocky Mountain Region: With Keys and Descriptions for Their Identification. New York [u.a.]: Putnam, 1927.

MLA (9th ed.) Citation

Longyear, Burton O. Trees and Shrubs of the Rocky Mountain Region: With Keys and Descriptions for Their Identification. Putnam, 1927.

Warning: These citations may not always be 100% accurate.