APA-referens (7:e uppl.)
Twomey, D. P. (1989). Labor & employment law, text & cases (8th ed.). South-Western Pub. Co..
Chicago-referens (17:e uppl.)
Twomey, David P. Labor & Employment Law, Text & Cases. 8th ed. Cincinnati: South-Western Pub. Co., 1989.
MLA-referens (9:e uppl.)
Twomey, David P. Labor & Employment Law, Text & Cases. 8th ed. South-Western Pub. Co., 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.