United Nations. Dept. of Social Affairs. (1952). In-service training in social welfare. s.n.
芝加哥风格引文United Nations. Dept. of Social Affairs. In-service Training in Social Welfare. New York: s.n, 1952.
MLA引文United Nations. Dept. of Social Affairs. In-service Training in Social Welfare. s.n, 1952.
警告：这些引文格式不一定是100％准确.