1. 1993 Rules and Guidance for Pharmaceutical Manufacturers 1993; HMSO; London.
2. 1993 Guidelines for the Blood Transfusion Service (2nd Edition); Section 3: Guidelines for reagents for blood group serology and HLA typing; HMSO; London.
3. 1993 Code of Federal Regulations, Title 21: Parts 600-799; US Government Printing Office; Washington.