Dyfyniad APA

Campbell, D. T. 1., Stanley, J. C., & Gage, N. L. (1963). Experimental and quasi-experimental designs for research. R. McNally.

Dyfyniad Arddull Chicago

Campbell, Donald Thomas 1916, Julian C. Stanley, and Nathaniel Lees Gage. Experimental and Quasi-experimental Designs for Research. Chicago: R. McNally, 1963.

Dyfyniad MLA

Campbell, Donald Thomas 1916, et al. Experimental and Quasi-experimental Designs for Research. R. McNally, 1963.

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