(2000). Implementing rules and regulations of the Philippine Clean Air Act of 1999: (Republic Act No. 8749). Department of Environment and Natural Resources.
Παραπομπή σε μορφή Chicago (17η εκδ.)Implementing Rules and Regulations of the Philippine Clean Air Act of 1999: (Republic Act No. 8749). Quezon City: Department of Environment and Natural Resources, 2000.
Παραπομπή σε μορφή MLA (9th εκδ.)Implementing Rules and Regulations of the Philippine Clean Air Act of 1999: (Republic Act No. 8749). Department of Environment and Natural Resources, 2000.
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