Cooley, W. W., & Lohnes, P. R. (1976). Evaluation research in education. Irvington Publishers : distributed by Halsted Press.
Dyfyniad Arddull ChicagoCooley, William W., and Paul R. Lohnes. Evaluation Research in Education. New York: Irvington Publishers : distributed by Halsted Press, 1976.
Dyfyniad MLACooley, William W., and Paul R. Lohnes. Evaluation Research in Education. Irvington Publishers : distributed by Halsted Press, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.