1. USP 29 NF 24 (2006) 12601 Twin brook Packway, Rockville, MD 20852
2. Manual of Drugs Laws (2006) The Drugs Act 1976, Pakistan
3. United States Department of Health and Human Services (2002) Food and Drug Act, Code of Federal Regulations cGMP Title 21, FDA Parts 210 & 211
4. Pharmaceutical Inspection Convention Pharmaceutical inspection corporation scheme/Guide to Good Manufacturing Practice for Medicinal Products Part I & II (2007)
5. Good Manufacturing Practice Guide for Active Pharmaceutical ingredients. In: International conference on harmonization harmonized tripartite guideline (2005)