APA
"UN E. C. F. E., "UN E. C. F. E., . (1988). Annual review of the chemical industy. New: York United Nations U S A.
Chicago
"UN ECONOMIC COMMISSION FOR EUROPE", "UN ECONOMIC COMMISSION FOR EUROPE", . 1988. Annual review of the chemical industy. New: York United Nations U S A.
Harvard
"UN E. C. F. E., "UN E. C. F. E., . (1988). Annual review of the chemical industy. New: York United Nations U S A.
MLA
"UN ECONOMIC COMMISSION FOR EUROPE", "UN ECONOMIC COMMISSION FOR EUROPE", . Annual review of the chemical industy. New: York United Nations U S A. 1988.
