BEAL, E. F., & WICKERSHAM, E. D. (1967). The practice of collective bargaining. Richard D. Irwin.
Lua i Stíl Chicago (17ú heag.)BEAL, Edwin F., agus Edward D. WICKERSHAM. The Practice of Collective Bargaining. Homewood: Richard D. Irwin, 1967.
Lua MLA (9ú heag.)BEAL, Edwin F., agus Edward D. WICKERSHAM. The Practice of Collective Bargaining. Richard D. Irwin, 1967.
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