References :
1. Vir Singh, Bhai, ed., Puratan Janam Sakhi, Amritsar, 1982
2. Santokh Singh, Bhai, Sri Gur Pratap Suraj Granth. Amritsar, 1926-37
3. Kohli, Surindar Singh, ed.,Janani Sakhi” Bhai Bala. Chandigarh, 1975
4. Macauliffe, Max Arthur, The Sikh Religion. Oxford, 1909
5. Harbans Singh, Guru Nanak and the Origins of the Sikh Faith. Delhi, 1969