Ecumenical Center for Development. (1982). Philippine regional profiles. Ecumenical Center for Development.
Chicago-referens (17:e uppl.)Ecumenical Center for Development. Philippine Regional Profiles. Quezon City: Ecumenical Center for Development, 1982.
MLA-referens (9:e uppl.)Ecumenical Center for Development. Philippine Regional Profiles. Ecumenical Center for Development, 1982.
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