Smith, M. L., & Glass, G. V. (1987). Research and evaluation in education and the social sciences. Prentice-Hall.
Dyfyniad Arddull ChicagoSmith, Mary Lee, and Gene V. Glass. Research and Evaluation in Education and the Social Sciences. Englewood Cliffs, N.J.: Prentice-Hall, 1987.
Dyfyniad MLASmith, Mary Lee, and Gene V. Glass. Research and Evaluation in Education and the Social Sciences. Prentice-Hall, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.