Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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