H.C. Verma, Dynamics of Urban Life in Pre-Mughal India, Munshiram Manoharlal, New Delhi, 1986; peter Jackson, The Delhi Sultanate: A Political and Military History, Cambridge University Press, 1999; Sunil Kumar, The Emergence of Delhi Sultanate, 1192-1286, Permanent Black, Ranikhet, 2007; U.N. Day, Administrative System of Delhi Sultanate, 1206-1413 AD, Kitab Mahal, 1959; Muhammad Habib and K.A.Nizami, A Comprehensive History of India: The Delhi Sultanate, AD 1206-1526, PPH, New Delhi, 1982, Nirmal Kumar, Essays in Medieval Delhi, Research India Press, New Delhi, 2015
Tapan Raychaudhury and Irfan Habib,eds., Cambridge Economic History of India, 1200-1750 CUP, Cambridge, 1982
K.S. LAL, History of the Khaljis, 1290-1320, Munshiram Manohar Lal, New Delhi, 1950
Irfan Habib, ‘Price Regulations of Alauddin Khalji: A Defence of Zia Barani, IESHR, vol.21, No.3, 1984
Irfan Habib, ‘Formation of Sultanate Ruling Class, Medieval India,1, Orient Longman, New Delhi, 1992
Kumkum Srivastava, Urdu in Medieval India, in Nirmal Kumar, ed, Essays in Medieval Delhi, Debates in Indian History Series, Research India Press, New Delhi 2015