Ohio Ste University, Columbus. Bureau of Business Research. (1946). Information sources for small business; a selected list of sources of information on beginning and operating a small business, by James C. Yocum, assisted by Emma Ferrin.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ohio Ste University, Columbus. Bureau of Business Research. Information Sources for Small Business; a Selected List of Sources of Information on Beginning and Operating a Small Business, by James C. Yocum, Assisted by Emma Ferrin. Ohio, 1946.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Ohio Ste University, Columbus. Bureau of Business Research. Information Sources for Small Business; a Selected List of Sources of Information on Beginning and Operating a Small Business, by James C. Yocum, Assisted by Emma Ferrin. 1946.