APA (7th ed.) Citation
(2008). Calendar of Events. Communications of the ACM, 51(12), 31.
Chicago Style (17th ed.) Citation
"Calendar of Events." Communications of the ACM 51, no. 12 (2008): 31.
MLA (9th ed.) Citation
"Calendar of Events." Communications of the ACM, vol. 51, no. 12, 2008, p. 31.
Warning: These citations may not always be 100% accurate.