APA (7th ed.) Citation
(2005). Top 10 Downloads from ACM's Digital Library. Communications of the ACM, 48(5), 21-23.
Chicago Style (17th ed.) Citation
"Top 10 Downloads from ACM's Digital Library." Communications of the ACM 48, no. 5 (2005): 21-23.
MLA (9th ed.) Citation
"Top 10 Downloads from ACM's Digital Library." Communications of the ACM, vol. 48, no. 5, 2005, pp. 21-23.
Warning: These citations may not always be 100% accurate.