APA (7th ed.) Citation

Willis, O. R. (1894). A practical flora for schools and colleges. American book co..

Chicago Style (17th ed.) Citation

Willis, Oliver R. A Practical Flora for Schools and Colleges. New York, Cincinnati [etc.]: American book co., 1894.

MLA (9th ed.) Citation

Willis, Oliver R. A Practical Flora for Schools and Colleges. American book co., 1894.