APA
"United Nations G. O. . E. C. F. E., "United Nations G. O. . E. C. F. E., . (1970). Problems of air and water pollution arising in the iron and steel industry. New: York United Nation U S A.
Chicago
"United Nations Government Of Economic Commission For Eurpoe", "United Nations Government Of Economic Commission For Eurpoe", . 1970. Problems of air and water pollution arising in the iron and steel industry. New: York United Nation U S A.
Harvard
"United Nations G. O. . E. C. F. E., "United Nations G. O. . E. C. F. E., . (1970). Problems of air and water pollution arising in the iron and steel industry. New: York United Nation U S A.
MLA
"United Nations Government Of Economic Commission For Eurpoe", "United Nations Government Of Economic Commission For Eurpoe", . Problems of air and water pollution arising in the iron and steel industry. New: York United Nation U S A. 1970.
