National Conference on Social Security New York & American Association for Social Security. (1928). Old age security: Report of proceedings, first National conference on old age security, held in New York city, April 10, 1928. American association for old age security.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)National Conference on Social Security New York và American Association for Social Security. Old Age Security: Report of Proceedings, First National Conference on Old Age Security, Held in New York City, April 10, 1928. New York city: American association for old age security, 1928.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)National Conference on Social Security New York và American Association for Social Security. Old Age Security: Report of Proceedings, First National Conference on Old Age Security, Held in New York City, April 10, 1928. American association for old age security, 1928.