Text Books:

1. Immunology: Understanding The Immune System: By Klaus D. Elgert
2. Antibodies, Their Structure and Function: By Michael W. Steward
3. Practical Immunology: Frank.C Hay and Olwyn M R Westwood

Webliography

1. http://www.wiley.com/legacy/products/subject/life/elgert/CH04.pdf
2. http://www.gbiosciences.com/Fab_Fragmentation.aspx