توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

University of Maryland, College Park. Bureau of Business and Economic Research. (1949). Baltimore: some economic indicators: Comparisons with other cities, relation to State of Maryland.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

University of Maryland, College Park. Bureau of Business and Economic Research. Baltimore: Some Economic Indicators: Comparisons with Other Cities, Relation to State of Maryland. College Park, 1949.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

University of Maryland, College Park. Bureau of Business and Economic Research. Baltimore: Some Economic Indicators: Comparisons with Other Cities, Relation to State of Maryland. 1949.

تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.