APA (7th ed.) Citation

Willis, F. L. (1959). The key to successful gardening in Southwest Texas. [publisher not identified].

Chicago Style (17th ed.) Citation

Willis, Frank Leonard. The Key to Successful Gardening in Southwest Texas. [Place of publication not identified]: [publisher not identified], 1959.

MLA (9th ed.) Citation

Willis, Frank Leonard. The Key to Successful Gardening in Southwest Texas. [publisher not identified], 1959.