Hagen, R., L., .., T., &., E., P.(1977).Measurement and Evaluation in Psychology and Education Fourth Edition .New York. Chichester:John Wiley and Sons.
Gaya MLA
Hagen, R., L., .., T., &., E., P..Measurement and Evaluation in Psychology and Education Fourth Edition.New York. Chichester:John Wiley and Sons,1977.Lawas.