Cita APA (7a ed.)
Whelan, D. (2001). The Instant Messaging Market. American Demographics, 23(12), 28-32.
Cita Chicago Style (17a ed.)
Whelan, David. "The Instant Messaging Market." American Demographics 23, no. 12 (2001): 28-32.
Cita MLA (9a ed.)
Whelan, David. "The Instant Messaging Market." American Demographics, vol. 23, no. 12, 2001, pp. 28-32.
Precaución: Estas citas no son 100% exactas.