Cita APA (7th ed.)
Hays, S. (1970). An outline of statistics (ed.). Longman.
Cita Chicago (17th ed.)
Hays, Samuel. An Outline of Statistics. ed. London: Longman, 1970.
Cita MLA (9th ed.)
Hays, Samuel. An Outline of Statistics. ed. Longman, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.