APA (7th ed.) Citation

Sitomer, M., & Sitomer, H. (1970). What is symmetryn. Thomas Y. Crowell.

Chicago Style (17th ed.) Citation

Sitomer, Mindel, and Harry Sitomer. What Is Symmetryn. New York: Thomas Y. Crowell, 1970.

MLA (9th ed.) Citation

Sitomer, Mindel, and Harry Sitomer. What Is Symmetryn. Thomas Y. Crowell, 1970.

Warning: These citations may not always be 100% accurate.