Doll, E. A. "Practical Implications of the Endogenous-Exogenous Classification of Mental Defectives ." American Journal of Mental Deficiency, I (1946), 503-511.
2.
Penrose, L. S. & Raven, J. C.A New Series of Perceptual Tests: Preliminary Communication. British Journal of Medical Psychology , XVI (1936), 97-104.
3.
Raven, J. C.The R.E.C.I. Series of Perceptual Tests: An Experimental Survey. British Journal of Medical Psychology, XVIII ( 1939), 16-34.
4.
Raven, J. C. "Matrix Tests ." Mental Health, I (1940), 10-18.
5.
Raven, J. C. "Standardization of Progressive Matrices, 1938." British Journal of Medical Psychology, XIX (1941 ), 137-150.
6.
Rimaldi, H. J. A. "A Note on Raven's Progressive Matrices Test." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, VIII (1948), 347-352.
7.
Spearman, C.The Nature of Intelligence and the Principles of Cognition. London: MacMillan and Co., Ltd., 1923.