Não informado. (1949). Michigan business review. Michigan University, School of Business Administration, Bureau of Business.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Michigan Business Review. Ann Arbor, Mich: Michigan University, School of Business Administration, Bureau of Business, 1949.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Michigan Business Review. Michigan University, School of Business Administration, Bureau of Business, 1949.
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