Cita APA (7th ed.)

Johnson, R. R. (1976). Elementary statistics (2nd ed.). Duxbury.

Cita Chicago (17th ed.)

Johnson, Robert R. Elementary Statistics. 2nd ed. Massachusetts: Duxbury, 1976.

Cita MLA (9th ed.)

Johnson, Robert R. Elementary Statistics. 2nd ed. Duxbury, 1976.