Babson, R. W. (1916). Business barometers used in the accumulation of money: A text book on applied economics for merchants, bankers and investors ((9th ed.) Issued Oct., 1916.). Babson's statistical organization.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Babson, Roger Ward. Business Barometers Used in the Accumulation of Money: A Text Book on Applied Economics for Merchants, Bankers and Investors. (9th ed.) Issued Oct., 1916. Wellesley Hills, Mass.: Babson's statistical organization, 1916.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Babson, Roger Ward. Business Barometers Used in the Accumulation of Money: A Text Book on Applied Economics for Merchants, Bankers and Investors. (9th ed.) Issued Oct., 1916. Babson's statistical organization, 1916.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.