1. Abbas AK, Lichtman AH. Cellular and Molecular Immunology, 5th edn. Philadelphia, PA: Saunders, 2005
2. Knox BR. Biology, 2nd edn. Roseville, NSW: McGraw-Hill, 2001
3. Th1 Fate Determination in CD4+ T Cells: Notice Is Served of the Importance of IL-12!
4. Roitt IM, Brostoff J, Male DK. Immunology. London: Mosby, 1998