Hays, S. (1966). An outline of Statistics. Longmans, Green.
Cita Chicago (17th ed.)Hays, Samuel. An Outline of Statistics. London: Longmans, Green, 1966.
Cita MLA (9th ed.)Hays, Samuel. An Outline of Statistics. Longmans, Green, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.