Elementary principles of behavior / Donald L. Whaley, Richard W. Malott. – New York: Appleton-Century-Crofts, Educational Division, Meredith Corporation, 1971.
Tjitendero, DR Mose Penaani
http://192.168.151.11//elementary-principles-of-behavior-donald-l-whaley-richard-w-malott-new-york-appleton-century-crofts-educational-division-meredith-corporation-1971
PA 3/5/3/138