Twomey, D. P. (1989). Labor & employment law, text & cases (8th ed.). South-Western Pub. Co.
Chicago Style (17. basım) AtıfTwomey, David P. Labor & Employment Law, Text & Cases. 8th ed. Cincinnati: South-Western Pub. Co, 1989.
MLA (9th ed.) AtıfTwomey, David P. Labor & Employment Law, Text & Cases. 8th ed. South-Western Pub. Co, 1989.
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