Dyfyniad APA

Campbell, D. T., Gage, N. L., & Stanley, J. C. (1966). Experimental and quasi-experimental designs for research. RAND McNally College.

Dyfyniad Arddull Chicago

Campbell, Donald Thomas, N. L. Gage, and Julian C. Stanley. Experimental and Quasi-experimental Designs for Research. Chicago: RAND McNally College, 1966.

Dyfyniad MLA

Campbell, Donald Thomas, et al. Experimental and Quasi-experimental Designs for Research. RAND McNally College, 1966.

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