Lua APA (7ú heag.)
Chen, M. (2004). Grey systems: Theory and applications. Emerald Group Publishing.
Lua i Stíl Chicago (17ú heag.)
Chen, Mian-Yun. Grey Systems: Theory and Applications. Bradford, West Yorkshire, England: Emerald Group Publishing, 2004.
Lua MLA (9ú heag.)
Chen, Mian-Yun. Grey Systems: Theory and Applications. Emerald Group Publishing, 2004.
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