APA
Shadish W. R., Campbell Donald T & Cook Thomas D. (2002). Experimental and quasi-experimental designs for generalized. Belmont: Wadsworth Cengage Learning.
Chicago
Shadish WIlliam R, Campbell Donald T and Cook Thomas D. 2002. Experimental and quasi-experimental designs for generalized. Belmont: Wadsworth Cengage Learning.
Harvard
Shadish W. R., Campbell Donald T and Cook Thomas D. (2002). Experimental and quasi-experimental designs for generalized. Belmont: Wadsworth Cengage Learning.
MLA
Shadish WIlliam R, Campbell Donald T and Cook Thomas D. Experimental and quasi-experimental designs for generalized. Belmont: Wadsworth Cengage Learning. 2002.