एपीए उद्धरण

Không rõ. (1990). Computer Communication Systems. NOTNXB.

शिकागो स्टाइल उद्धरण

Không rõ. Computer Communication Systems. NOTNXB, 1990.

एमएलए उद्धरण

Không rõ. Computer Communication Systems. NOTNXB, 1990.