APA引文

United Nations. Dept. of Social Affairs. (1952). In-service training in social welfare. s.n.

Chicago Style (17th ed.) Citation

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：這些引文格式不一定是100％准確.