APA aipamena

Không rõ. (2000). Product Design and Development. NOTNXB.

Chicago Style aipamena

Không rõ. Product Design and Development. NOTNXB, 2000.

MLA aipamena

Không rõ. Product Design and Development. NOTNXB, 2000.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.