Lua APA (7ú heag.)
Twomey, D. P. (1989). Labor & employment law, text & cases (8th ed.). South-Western Pub. Co..
Lua i Stíl Chicago (17ú heag.)
Twomey, David P. Labor & Employment Law, Text & Cases. 8th ed. Cincinnati: South-Western Pub. Co., 1989.
Lua MLA (9ú heag.)
Twomey, David P. Labor & Employment Law, Text & Cases. 8th ed. South-Western Pub. Co., 1989.
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