Cita APA (7a ed.)
(1999). Alarm system helps city secure buildings. American City & County, 114(1), 18-20.
Cita Chicago Style (17a ed.)
"Alarm System Helps City Secure Buildings." American City & County 114, no. 1 (1999): 18-20.
Cita MLA (9a ed.)
"Alarm System Helps City Secure Buildings." American City & County, vol. 114, no. 1, 1999, pp. 18-20.
Precaución: Estas citas no son 100% exactas.