APA (7th ed.) Zitazioa
Espejo, R. (2004). Tribute to Stafford Beer. Emerald Group Publishing.
Chicago Style (17th ed.) Zitazioa
Espejo, Raul. Tribute to Stafford Beer. Bradford, West Yorkshire, England: Emerald Group Publishing, 2004.
MLA (9th ed.) Zitazioa
Espejo, Raul. Tribute to Stafford Beer. Emerald Group Publishing, 2004.
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