Cita APA (7th ed.)
Johnson, R. (1996). Elementary statistics (7th ed.). Duxbury.
Cita Chicago (17th ed.)
Johnson, Robert. Elementary Statistics. 7th ed. Belmont: Duxbury, 1996.
Cita MLA (9th ed.)
Johnson, Robert. Elementary Statistics. 7th ed. Duxbury, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.