एपीए उद्धरण

Rey, R. F. (1983). Engineering and operations in the bell system. Murray Hill: AT & T Bell Laboratories.

शिकागो स्टाइल उद्धरण

Rey, R. F. Engineering and Operations in the Bell System. Murray Hill: AT & T Bell Laboratories, 1983.

एमएलए उद्धरण

Rey, R. F. Engineering and Operations in the Bell System. Murray Hill: AT & T Bell Laboratories, 1983.