Gaya APA

Halim, S. et al ([2020]). Competitive programming 4 : The lower bound of programming contest in the 2020s buku 2 (Volume Kedua). : SIMCC dan Noble Education.

Gaya MLA

Halim, Steven. et al. "Competitive programming 4 : The lower bound of programming contest in the 2020s buku 2". Volume Kedua : SIMCC dan Noble Education, [2020]. Text.