APA aipamena

Không rõ. (2010). Communication Systems. NOTNXB.

Chicago Style aipamena

Không rõ. Communication Systems. NOTNXB, 2010.

MLA aipamena

Không rõ. Communication Systems. NOTNXB, 2010.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.