APA (7th ed.) Citation

Hall, W. L., & von Schrenk, H. (1902). Hardy catalpa. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Hall, William L., and Hermann von Schrenk. Hardy Catalpa. [Washington, D.C.]: U.S. Government Printing Office, 1902.

MLA (9th ed.) Citation

Hall, William L., and Hermann von Schrenk. Hardy Catalpa. U.S. Government Printing Office, 1902.