1. “The Discovery of India” by Jawaharlal Nehru.
2. “The Framing of Indian Constitution: A Study” by B. Siva Rao.
3. Indian Constitutional Documents (1757 – 1939)” by A.C. Banerjee.
4. Article on “Federalism: Nature and Working” by A.S. Narang, in the book titled “Rethinking of Centre-State relations in India”, edited by R.C. Sobti and Ashutosh Kumar
5. Indira Gandhi – Selected Speeches and Writings (Vol. V : 1982-84).”
6. Union-State Relations in India” by R.C.S. Sarkar, former Law Secretary, Government of India, and Chairman, Union Public Service Commission.