Roberts, B. R., & Berg, N. (2012). Walmart: Key insights and practical lessons from the world's largest retailer. Kogan Page.
Čikaški stil citiranjaRoberts, Bryan R., i Natalie Berg. Walmart: Key Insights and Practical Lessons from the World's Largest Retailer. London ; Philadelphia, PA: Kogan Page, 2012.
MLA način citiranjaRoberts, Bryan R., i Natalie Berg. Walmart: Key Insights and Practical Lessons from the World's Largest Retailer. Kogan Page, 2012.
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