APA
World Health Organization. Regional Office for the Western Pacific, Western Pacific Regional Centre for the Promotion of Environmental Planning and Applied Studies (PEPAS), . (1981). Air quality monitoring and control. Manila: WHO Regional Office for the Western Pacific.
Chicago
World Health Organization. Regional Office for the Western Pacific, Western Pacific Regional Centre for the Promotion of Environmental Planning and Applied Studies (PEPAS), . 1981. Air quality monitoring and control. Manila: WHO Regional Office for the Western Pacific.
Harvard
World Health Organization. Regional Office for the Western Pacific, Western Pacific Regional Centre for the Promotion of Environmental Planning and Applied Studies (PEPAS), . (1981). Air quality monitoring and control. Manila: WHO Regional Office for the Western Pacific.
MLA
World Health Organization. Regional Office for the Western Pacific, Western Pacific Regional Centre for the Promotion of Environmental Planning and Applied Studies (PEPAS), . Air quality monitoring and control. Manila: WHO Regional Office for the Western Pacific. 1981.