Aliport, G.W.The Use of Personal Documents in Psychological Science. Social Science Research Monograph, No. 49, 1942.
2.
Findley, W.G. and Scates, D.E. "Obtaining Evidence of Understanding." Measurement of Understanding, 45th Yearbook. New York: National Society for the Study of Education, 1946. Part I, chapter IV.
3.
Frank, L.K. "Projective Methods for the Study of Personality." Journal of Psychology, VIII (1939 ), 389-413.
4.
. Sargent, Helen. "Projective Methods: Their Origins, Theory and Application in Personality Research." Psychological Bulletin, XLII (1945), 257-293.
5.
Stalnaker, J.M. "Essay Examinations Reliability Read." School and Society, XLVI ( 1937), 671-672.