1. Textbook of Preventive and Social Medicine By park and park 27th edission. Ch 5.
2. IAP guide book on immunization.2018- 19. By Pallab chatterjee. Ch 3
3. Immunization hand book for health workers by Dr Renu paruti. Ch 6.
4. Immunization hand book for health workers by Dr.Madhu lekha. Ch 5.
5. Textbook of Preventive and Social Medicine By park and park 27th edission. Ch 5.