APA (7th ed.) Citation

Sedgewick, R., Graham, S., & Rivest, R. (1978). Implementing Quicksort Programs. Communications of the ACM, 21(10), 847. https://doi.org/10.1145/359619.359631

Chicago Style (17th ed.) Citation

Sedgewick, Robert, S.L Graham, and R.L Rivest. "Implementing Quicksort Programs." Communications of the ACM 21, no. 10 (1978): 847. https://doi.org/10.1145/359619.359631.

MLA (9th ed.) Citation

Sedgewick, Robert, et al. "Implementing Quicksort Programs." Communications of the ACM, vol. 21, no. 10, 1978, p. 847, https://doi.org/10.1145/359619.359631.