Written By: William R. Shadish, Thomas D. Cook, Donald T. Campbell
Our Price: $91.46 (N/A)
Written By: William R. Shadish, Thomas D. Cook, Laura C. Leviton
Our Price: $71.95 ($82.95), You Save: $ 11.00
Written By: William R.; Cook, Thomas; Leviton, Laura C. Shadish
Our Price: $125.12 ($65.00)
Our Price: $110.00 ($110.00)
Our Price: $94.95 ($94.95)
Written By: William R. Shadish
Our Price: $60.00 ($60.00)
