Costello, M. (1992). Net migration in the Philippines: 1980-1990. Department of Labor and Employment/ILO-ARTEP.
Chicago-referens (17:e uppl.)Costello, Michael. Net Migration in the Philippines: 1980-1990. Manila: Department of Labor and Employment/ILO-ARTEP, 1992.
MLA-referens (9:e uppl.)Costello, Michael. Net Migration in the Philippines: 1980-1990. Department of Labor and Employment/ILO-ARTEP, 1992.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.