International Organization for Standardization. (1981). Statistical methods (2nd ed.). ISO Central Secretariat.
Chicago-referens (17:e uppl.)International Organization for Standardization. Statistical Methods. 2nd ed. Geneva: ISO Central Secretariat, 1981.
MLA-referens (9:e uppl.)International Organization for Standardization. Statistical Methods. 2nd ed. ISO Central Secretariat, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.