Tuulmets, T. (1991). The perception of visual numerosity. Department of Psychology, University of Umeå.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTuulmets, Tiia. The Perception of Visual Numerosity. Umeå: Department of Psychology, University of Umeå, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTuulmets, Tiia. The Perception of Visual Numerosity. Department of Psychology, University of Umeå, 1991.
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