Liljedahl, P., Santos-Trigo, M., Malaspina, U., & Bruder, R. (2016). Problem Solving in Mathematics Education. Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-319-40730-2
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLiljedahl, Peter, Manuel Santos-Trigo, Uldarico Malaspina, और Regina Bruder. Problem Solving in Mathematics Education. Cham: Springer International Publishing : Imprint: Springer, 2016. https://doi.org/10.1007/978-3-319-40730-2.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLiljedahl, Peter, et al. Problem Solving in Mathematics Education. Springer International Publishing : Imprint: Springer, 2016. https://doi.org/10.1007/978-3-319-40730-2.
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