Cita APA (7a ed.)

Hull, C. L. (1920). Quantitative aspects of the evolution of concepts. [s.n.].

Cita Chicago Style (17a ed.)

Hull, Clark Leonard. Quantitative Aspects of the Evolution of Concepts. [S.l.]: [s.n.], 1920.

Cita MLA (9a ed.)

Hull, Clark Leonard. Quantitative Aspects of the Evolution of Concepts. [s.n.], 1920.