Preston, R. J. (1947). Rocky mountain trees: A handbook of the native species with plates and distribution maps (2d. ed.). Iowa State College Press.
Chicago Style (17th ed.) CitationPreston, Richard J. Rocky Mountain Trees: A Handbook of the Native Species with Plates and Distribution Maps. 2d. ed. Ames: Iowa State College Press, 1947.
MLA (9th ed.) CitationPreston, Richard J. Rocky Mountain Trees: A Handbook of the Native Species with Plates and Distribution Maps. 2d. ed. Iowa State College Press, 1947.
Warning: These citations may not always be 100% accurate.