1. Ansel H. C. Introduction to Pharmaceutical Dosage Forms. Lea and Febiger Philadelphia. 1972; 342–352
2. Cooper and Gunn. Tutorial Pharmacy6th Edition, S. J. Carter. Pitman Medical. 1972; 13–113
3. Cooper and Gunn. Dispensing for Pharmacy Students13th Edition, S. J. Carter. Pitman Medical. 1972; 232–251