Rigby, D. The future of shopping. Harvard Business Review.
Čikaški stil citiranja (17. izdanje)Rigby, Darrell. "The Future of Shopping." Harvard Business Review .
MLA način citiranja (9. izdanje)Rigby, Darrell. "The Future of Shopping." Harvard Business Review, .
Upozorenje: Ovi citati možda nisu uvijek 100% točni.