Dyfyniad APA

Worthen, B. R., & Sanders, J. R. (1987). Educational evaluation: Alternative approaches and practical guidelines. Longman.

Dyfyniad Arddull Chicago

Worthen, Blaine R., and James R. Sanders. Educational Evaluation: Alternative Approaches and Practical Guidelines. New York: Longman, 1987.

Dyfyniad MLA

Worthen, Blaine R., and James R. Sanders. Educational Evaluation: Alternative Approaches and Practical Guidelines. Longman, 1987.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.