References
- Anastasi , A. 1976 . Psychological Testing , 4th ed. , 134 – 139 . New York : Macmillan .
- Campbell , D. T. and Stanley , J. C. 1963 . Experimental and Quasi-Experimental Designs for Research , Chicago : Rand McNally and Company .
- McNemar , Q. 1969 . Psychological Statistics , 4th ed. , New York : John Wiley & Sons, Inc. .
- Peterson , F. 1984 . The Heart Treasure Chest Evaluation Project , Texas Affiliate, Austin , TX : American Heart Association .