U.S. Bureau of Labor Statistics. (1961). Salaries and working conditions of social welfare manpower in 1960. A survey conducted by the U.S. Dept. of Labor, Bureau of Statistics in cooperation with the National Social Welfare Assembly, inc. and the U.S. Dept. of Health, Education, and Welfare. National Social Welfare Assembly.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিU.S. Bureau of Labor Statistics. Salaries and Working Conditions of Social Welfare Manpower in 1960. A Survey Conducted by the U.S. Dept. of Labor, Bureau of Statistics in Cooperation with the National Social Welfare Assembly, Inc. and the U.S. Dept. of Health, Education, and Welfare. New York: National Social Welfare Assembly, 1961.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিU.S. Bureau of Labor Statistics. Salaries and Working Conditions of Social Welfare Manpower in 1960. A Survey Conducted by the U.S. Dept. of Labor, Bureau of Statistics in Cooperation with the National Social Welfare Assembly, Inc. and the U.S. Dept. of Health, Education, and Welfare. National Social Welfare Assembly, 1961.