Παραπομπή σε μορφή APA (7η εκδ.)

Martin, J. E., & Heetderks, T. D. (1990). Two-tier compensation structures: Their impact on union employers and employees. W.E. Upjohn Institute for Employment Research.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Martin, James E., και Thomas D. Heetderks. Two-tier Compensation Structures: Their Impact on Union Employers and Employees. Kalamazoo, Mich: W.E. Upjohn Institute for Employment Research, 1990.

Παραπομπή σε μορφή MLA (9th εκδ.)

Martin, James E., και Thomas D. Heetderks. Two-tier Compensation Structures: Their Impact on Union Employers and Employees. W.E. Upjohn Institute for Employment Research, 1990.