Johnson, L. A. (1969). Employing the hard-core unemployed. American Management Association.
芝加哥风格引文Johnson, Lawrence Alexander. Employing the Hard-core Unemployed. [New York]: American Management Association, 1969.
MLA引文Johnson, Lawrence Alexander. Employing the Hard-core Unemployed. American Management Association, 1969.
警告：这些引文格式不一定是100％准确.