APA
"UNITED NATIONS E. A. S. A. (. o., "UNITED NATIONS E. A. S. A. (. o., . (2008). "International standard industrial classification of all economic activities (ISIC), Rev. 4". United: Nations New York.
Chicago
"UNITED NATIONS ECONOMIC AND SOCIAL AFFAIRS (Deptt of-)", "UNITED NATIONS ECONOMIC AND SOCIAL AFFAIRS (Deptt of-)", . 2008. "International standard industrial classification of all economic activities (ISIC), Rev. 4". United: Nations New York.
Harvard
"UNITED NATIONS E. A. S. A. (. o., "UNITED NATIONS E. A. S. A. (. o., . (2008). "International standard industrial classification of all economic activities (ISIC), Rev. 4". United: Nations New York.
MLA
"UNITED NATIONS ECONOMIC AND SOCIAL AFFAIRS (Deptt of-)", "UNITED NATIONS ECONOMIC AND SOCIAL AFFAIRS (Deptt of-)", . "International standard industrial classification of all economic activities (ISIC), Rev. 4". United: Nations New York. 2008.
