Cita APA (7a ed.)

Herrnstein, R. J. (1961). Relative and absolute strength of response as a function pf frequency of reinforcement. [s.n.].

Cita Chicago Style (17a ed.)

Herrnstein, Richard J. Relative and Absolute Strength of Response as a Function Pf Frequency of Reinforcement. [S.l.]: [s.n.], 1961.

Cita MLA (9a ed.)

Herrnstein, Richard J. Relative and Absolute Strength of Response as a Function Pf Frequency of Reinforcement. [s.n.], 1961.