Não informado. (1976). American journal of small business. University of Baltimore, School of Business.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. American Journal of Small Business. Baltimore, Md: University of Baltimore, School of Business, 1976.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. American Journal of Small Business. University of Baltimore, School of Business, 1976.
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