Philippines. National Economic and Development Authority. Regional Development Council, Region I. (1976). Demographic profile on Region I: A study on population growth, composition and employment. The Council.
Chicago-Zitierstil (17. Ausg.)Philippines. National Economic and Development Authority. Regional Development Council, Region I. Demographic Profile on Region I: A Study on Population Growth, Composition and Employment. San Fernando, La Union: The Council, 1976.
MLA-Zitierstil (9. Ausg.)Philippines. National Economic and Development Authority. Regional Development Council, Region I. Demographic Profile on Region I: A Study on Population Growth, Composition and Employment. The Council, 1976.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.