APA (7th ed.) Citation

Epstein, S., & Epstein, B. (1961). The first book of teaching machines. Franklin Watts.

Chicago Style (17th ed.) Citation

Epstein, Sam, and Beryl Epstein. The First Book of Teaching Machines. New York: Franklin Watts, 1961.

MLA (8th ed.) Citation

Epstein, Sam, and Beryl Epstein. The First Book of Teaching Machines. Franklin Watts, 1961.