APA (7th ed.) Citation

Arnold Arboretum & Sargent, C. S. (1921). A guide to the Arnold Arboretum (Second edition.). Printed at the Riverside Press.

Chicago Style (17th ed.) Citation

Arnold Arboretum and Charles Sprague Sargent. A Guide to the Arnold Arboretum. Second edition. Cambridge: Printed at the Riverside Press, 1921.

MLA (9th ed.) Citation

Arnold Arboretum and Charles Sprague Sargent. A Guide to the Arnold Arboretum. Second edition. Printed at the Riverside Press, 1921.