School Mathematics Study Group, Wilson, J. W., Cahen, L. S., & Begle, E. G. (1968). Description and statistical properties of population scales. Leland Stanford Junior University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchool Mathematics Study Group, James W. Wilson, Leonard S. Cahen, और Edward G. Begle. Description and Statistical Properties of Population Scales. Stanford, CA: Leland Stanford Junior University, 1968.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSchool Mathematics Study Group, et al. Description and Statistical Properties of Population Scales. Leland Stanford Junior University, 1968.
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