Erricker, B. (1967). Elementary statistics. Orient Longmans.
Cita Chicago (17th ed.)Erricker, B. Elementary Statistics. Bombay: Orient Longmans, 1967.
Cita MLA (9th ed.)Erricker, B. Elementary Statistics. Orient Longmans, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.