Schalock, R. L. (2001). Outcome-based evaluation. New York: Kluwer Academic/Plenum Publishers.
Dyfyniad Arddull ChicagoSchalock, Robert L. Outcome-based Evaluation. New York: Kluwer Academic/Plenum Publishers, 2001.
Dyfyniad MLASchalock, Robert L. Outcome-based Evaluation. New York: Kluwer Academic/Plenum Publishers, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.