Cita APA (7a ed.)
Hyman, P. (2011). Dennis Ritchie, 1941--2011. Communications of the ACM, 54(12), 21-22.
Cita Chicago Style (17a ed.)
Hyman, Paul. "Dennis Ritchie, 1941--2011." Communications of the ACM 54, no. 12 (2011): 21-22.
Cita MLA (9a ed.)
Hyman, Paul. "Dennis Ritchie, 1941--2011." Communications of the ACM, vol. 54, no. 12, 2011, pp. 21-22.
Precaución: Estas citas no son 100% exactas.