APA
"UNITED NATIONS I. D. O., "UNITED NATIONS I. D. O., . (1971). Manufacture of cement and sulphurie acid from calcium Sulphate. New: York United Nations U. S. A.
Chicago
"UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION.", "UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION.", . 1971. Manufacture of cement and sulphurie acid from calcium Sulphate. New: York United Nations U. S. A.
Harvard
"UNITED NATIONS I. D. O., "UNITED NATIONS I. D. O., . (1971). Manufacture of cement and sulphurie acid from calcium Sulphate. New: York United Nations U. S. A.
MLA
"UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION.", "UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION.", . Manufacture of cement and sulphurie acid from calcium Sulphate. New: York United Nations U. S. A. 1971.