APA (7th ed.) Citation

Copeland, H. M., & Walker, C. W. (1968). This snake is good. Crowell.

Chicago Style (17th ed.) Citation

Copeland, Helen Masson, and Charles W. Walker. This Snake Is Good. New York: Crowell, 1968.

MLA (9th ed.) Citation

Copeland, Helen Masson, and Charles W. Walker. This Snake Is Good. Crowell, 1968.