APA (7th ed.) Citation

Wirth, N., & Hoare, C. (1966). A Contribution to the Development of ALGOL. Communications of the ACM, 9(6), 413. https://doi.org/10.1145/365696.365702

Chicago Style (17th ed.) Citation

Wirth, Niklaus, and C.A.R Hoare. "A Contribution to the Development of ALGOL." Communications of the ACM 9, no. 6 (1966): 413. https://doi.org/10.1145/365696.365702.

MLA (9th ed.) Citation

Wirth, Niklaus, and C.A.R Hoare. "A Contribution to the Development of ALGOL." Communications of the ACM, vol. 9, no. 6, 1966, p. 413, https://doi.org/10.1145/365696.365702.