References
- Davidson , H. H. and Klopfer , B. 1937–1938 . “Rorschach Statistics: Part I – Mentally Retarded, Normal, and Superior Adults” . Rorschach Research Exchange , Volume 2 : 164 – 169 .
- Klopfer , B. and Kelley , D. 1942 . “The Rorschach Technique” , World Book Company .
- Rorschach , H. 1941 . “Psychodiagnostik Methodik und Ergebnisse eines Wahrnemungsdiagnostischen Experiments” , Fourth Edition , Berne , , Switzerland : Huber . English Edition, Berne, Switzerland, Huber, 1942