Pollution Control Association of the Philippines. Polluiton control laws and regulations of the Philippines. s.n.
Cita Chicago (17th ed.)Pollution Control Association of the Philippines. Polluiton Control Laws and Regulations of the Philippines. s.l: s.n.
Cita MLA (9th ed.)Pollution Control Association of the Philippines. Polluiton Control Laws and Regulations of the Philippines. s.n.
Atenció: Aquestes cites poden no estar 100% correctes.