APA (7th ed.) Citation
Denning, P. J. (2016). Fifty Years of Operating Systems. Communications of the ACM, 59(3), 30-33.
Chicago Style (17th ed.) Citation
Denning, Peter J. "Fifty Years of Operating Systems." Communications of the ACM 59, no. 3 (2016): 30-33.
MLA (9th ed.) Citation
Denning, Peter J. "Fifty Years of Operating Systems." Communications of the ACM, vol. 59, no. 3, 2016, pp. 30-33.
Warning: These citations may not always be 100% accurate.