Campbell, D. T. (1960). "Blind variation and selective retention in creative thought as in other knowledge processes". Psychological Review. 67 (6): 380–400. doi:10.1037/h0040373. PMID13690223.
Campbell, D. T. (1960). "Blind variation and selective retention in creative thought as in other knowledge processes". Psychological Review. 67 (6): 380–400. doi:10.1037/h0040373. PMID13690223.