Selection bias in the estimation of experimental and quasi-experimental effects /
by Robert A. Moffitt.
APA Citation
Moffitt, R. A. (1977). Selection bias in the estimation of experimental and quasi-experimental effects. Princeton, N. J.: Mathematica Policy Research.
MLA Citation
Moffitt, Robert A. Selection Bias In the Estimation of Experimental And Quasi-experimental Effects. Princeton, N. J.: Mathematica Policy Research, 1977.
Warning: These citations may not always be complete (especially for serials).