Roxas, F. (2005). Clark Zone a major accomplishment of the Arroyo administration. Manila Bulletin.
Chicago-viite (17. p.)Roxas, Fred. "Clark Zone a Major Accomplishment of the Arroyo Administration." Manila Bulletin 2005.
MLA-viite (9. p.)Roxas, Fred. "Clark Zone a Major Accomplishment of the Arroyo Administration." Manila Bulletin, 2005.
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