Cita APA (7a ed.)

Friedman, M. I., & Willis, M. R. (1981). Human nature and predictability. Lexington Books.

Cita Chicago Style (17a ed.)

Friedman, Myles I., y Martha R. Willis. Human Nature and Predictability. Lexington, Mass. [u.a.]: Lexington Books, 1981.

Cita MLA (8a ed.)

Friedman, Myles I., y Martha R. Willis. Human Nature and Predictability. Lexington Books, 1981.