Burford, R. L. (1966). A projections model for small area economies. Bureau of Business and Economic Research, School of Business Administration, Georgia State College.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Burford, Roger L. A Projections Model for Small Area Economies. Atlanta: Bureau of Business and Economic Research, School of Business Administration, Georgia State College, 1966.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Burford, Roger L. A Projections Model for Small Area Economies. Bureau of Business and Economic Research, School of Business Administration, Georgia State College, 1966.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.