APA (7th ed.) Citation

Heider, L. J., & Simpson, J. E. (1967). Theoretical analysis. Saunders.

Chicago Style (17th ed.) Citation

Heider, Lester J., and James E. Simpson. Theoretical Analysis. Philadelphia, PA: Saunders, 1967.

MLA (9th ed.) Citation

Heider, Lester J., and James E. Simpson. Theoretical Analysis. Saunders, 1967.