(2022). PRRD signs EO updating rules on advertising signs, billboards. Manila Bulletin.
Chicago Style (17. basım) Atıf"PRRD Signs EO Updating Rules on Advertising Signs, Billboards." Manila Bulletin 2022.
MLA (9th ed.) Atıf"PRRD Signs EO Updating Rules on Advertising Signs, Billboards." Manila Bulletin, 2022.
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