Stevens, J. P. (1999). Intermediate statistics: A modern approach (2nd ed.). Lawrence Erlbaum Associates.
Dyfyniad Arddull ChicagoStevens, James P. Intermediate Statistics: A Modern Approach. 2nd ed. New Jersey: Lawrence Erlbaum Associates, 1999.
Dyfyniad MLAStevens, James P. Intermediate Statistics: A Modern Approach. 2nd ed. Lawrence Erlbaum Associates, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.