Billstein, R., Libeskind, S., & Lott, J. W. (1984). A problem solving approach to mathematics for elementary school teachers (2nd ed.). Benjamin/Cummings.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBillstein, Rick, Shlomo Libeskind, और Johnny W. Lott. A Problem Solving Approach to Mathematics for Elementary School Teachers. 2nd ed. Menlo Park, Calif: Benjamin/Cummings, 1984.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBillstein, Rick, et al. A Problem Solving Approach to Mathematics for Elementary School Teachers. 2nd ed. Benjamin/Cummings, 1984.
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