Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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