Gould, R., Ryan, C. N. 1., & Wong, R. Essential statistics: Exploring the world through data (2nd edition.).

Gould, Robert, Colleen N. 1939- Ryan, و Rebecca Wong. Essential Statistics: Exploring the World Through Data. 2nd edition.

Gould, Robert, Colleen N. 1939- Ryan, و Rebecca Wong. Essential Statistics: Exploring the World Through Data. 2nd edition.