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