American Society of Training Directors. (1961). Selected bibliographies covering twenty-seven training subjects. s.n.
芝加哥风格引文American Society of Training Directors. Selected Bibliographies Covering Twenty-seven Training Subjects. Madison, Wis: s.n, 1961.
MLA引文American Society of Training Directors. Selected Bibliographies Covering Twenty-seven Training Subjects. s.n, 1961.
警告：这些引文格式不一定是100％准确.