Gruber, H. E., & Terrell, G. (1962). Contemporary approaches to creative thinking: A symposium held at the university of Colorado. Atherton.
Chicago-čujuhus (17. p.)Gruber, Howard E., juo Glenn Terrell. Contemporary Approaches to Creative Thinking: A Symposium Held at the University of Colorado. London: Atherton, 1962.
MLA-čujuhus (9. p.)Gruber, Howard E., juo Glenn Terrell. Contemporary Approaches to Creative Thinking: A Symposium Held at the University of Colorado. Atherton, 1962.
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