Cita APA (7a ed.)
Greengard, S. (2010). Spies Among Us? Communications of the ACM, 53(4), 17-19.
Cita Chicago Style (17a ed.)
Greengard, Samuel. "Spies Among Us?" Communications of the ACM 53, no. 4 (2010): 17-19.
Cita MLA (9a ed.)
Greengard, Samuel. "Spies Among Us?" Communications of the ACM, vol. 53, no. 4, 2010, pp. 17-19.
Precaución: Estas citas no son 100% exactas.