Cita APA (7th ed.)
Chen, M. (2004). Grey systems: Theory and applications. Emerald Group Publishing.
Cita Chicago (17th ed.)
Chen, Mian-Yun. Grey Systems: Theory and Applications. Bradford, West Yorkshire, England: Emerald Group Publishing, 2004.
Cita MLA (9th ed.)
Chen, Mian-Yun. Grey Systems: Theory and Applications. Emerald Group Publishing, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.