APA aipamena

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

Chicago Style aipamena

Không rõ. Computer Communication Systems. NOTNXB, 1990.

MLA aipamena

Không rõ. Computer Communication Systems. NOTNXB, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.