Cita APA (7th ed.)
Ingram, J. A. (1977). Elementary Statistics. Cummings.
Cita Chicago (17th ed.)
Ingram, John A. Elementary Statistics. Menlo Park [usw]: Cummings, 1977.
Cita MLA (9th ed.)
Ingram, John A. Elementary Statistics. Cummings, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.