Fernandez, P. V. (1982). Labor relations law. Tala Pub.
Lua i Stíl Chicago (17ú heag.)Fernandez, Perfecto Villanueva. Labor Relations Law. Quezon City: Tala Pub, 1982.
Lua MLA (9ú heag.)Fernandez, Perfecto Villanueva. Labor Relations Law. Tala Pub, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.