Johnson, L. A. (1969). Employing the hard-core unemployed. American Management Association.
Cita Chicago (17th ed.)Johnson, Lawrence Alexander. Employing the Hard-core Unemployed. [New York]: American Management Association, 1969.
Cita MLA (8th ed.)Johnson, Lawrence Alexander. Employing the Hard-core Unemployed. American Management Association, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.