Philippines. Department of Labor and Employment. (1989). Workers protection and welfare handbook. DOLE.
Chicago-referens (17:e uppl.)Philippines. Department of Labor and Employment. Workers Protection and Welfare Handbook. Manila: DOLE, 1989.
MLA-referens (9:e uppl.)Philippines. Department of Labor and Employment. Workers Protection and Welfare Handbook. DOLE, 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.