APA (7th ed.) Zitazioa
Butterfield, S. AMWAY: The Cult of Free Enterprise. South End Press.
Chicago Style (17th ed.) Zitazioa
Butterfield, Stephen. AMWAY: The Cult of Free Enterprise. Boston, EUA: South End Press.
MLA (9th ed.) Zitazioa
Butterfield, Stephen. AMWAY: The Cult of Free Enterprise. South End Press.
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