Halim, S., Halim, F., & Effendy, S. (2020). Competitive programming 4: The lower bound of programming contests in the 2020s. Ingram content group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHalim, Steven, Felix Halim, और Suhendry Effendy. Competitive Programming 4: The Lower Bound of Programming Contests in the 2020s. United States, UK: Ingram content group, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHalim, Steven, et al. Competitive Programming 4: The Lower Bound of Programming Contests in the 2020s. Ingram content group, 2020.
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