Halim, S., Halim, F., & Effendy, S. (2020). Competitive programming 4: The lower bound of programming contests in the 2020s. Ingram content group.
芝加哥风格引文Halim, Steven, Felix Halim, 与 Suhendry Effendy. Competitive Programming 4: The Lower Bound of Programming Contests in the 2020s. United States, UK: Ingram content group, 2020.
MLA引文Halim, Steven, et al. Competitive Programming 4: The Lower Bound of Programming Contests in the 2020s. Ingram content group, 2020.
警告：这些引文格式不一定是100％准确.