Cita APA (7a ed.)

Levin, J., & Fox, J. A. (1991). Elementary statistics in social research (5th ed.). Harper Collins.

Cita Chicago Style (17a ed.)

Levin, Jack, y James Alan Fox. Elementary Statistics in Social Research. 5th ed. New York: Harper Collins, 1991.

Cita MLA (9a ed.)

Levin, Jack, y James Alan Fox. Elementary Statistics in Social Research. 5th ed. Harper Collins, 1991.