(2007). Defining and clarifying the responsibilities of the Department of Environment and Natural Resources.. Manila Times.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)"Defining and Clarifying the Responsibilities of the Department of Environment and Natural Resources.." Manila Times 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)"Defining and Clarifying the Responsibilities of the Department of Environment and Natural Resources.." Manila Times, 2007.
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