APA-viite

Preethi Sara George. (1994). A study on ratio type estimators using several auxiliary variables. Dept of Statistics.

Chicago-tyylinen lähdeviittaus

Preethi Sara George. A Study on Ratio Type Estimators Using Several Auxiliary Variables. Trivandrum: Dept of Statistics, 1994.

MLA-viite

Preethi Sara George. A Study on Ratio Type Estimators Using Several Auxiliary Variables. Dept of Statistics, 1994.