Citazione Stile APA (7a Edizione)

Halim, S., & Halim, F. (2020). Competitive programming 4: The lower bound of programming contests in the 2020s. Ingram content group.

Citazione stile Chigago Style (17a edizione)

Halim, Steven, e Felix Halim. Competitive Programming 4: The Lower Bound of Programming Contests in the 2020s. United States, UK: Ingram content group, 2020.

Citatione MLA (8a ed.)

Halim, Steven, e Felix Halim. Competitive Programming 4: The Lower Bound of Programming Contests in the 2020s. Ingram content group, 2020.