Campbell, D. T. (1963). Experimental and quasi-experimental designs for research. Rand McNally College.
Cita Chicago (17th ed.)Campbell, Donald T. Experimental and Quasi-experimental Designs for Research. Chicago: Rand McNally College, 1963.
Cita MLA (9th ed.)Campbell, Donald T. Experimental and Quasi-experimental Designs for Research. Rand McNally College, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.