References :
1. Mani Singh, Bhai, Sikhan di Bhagat Mala. Amritsar, 1955
2. Santokh Singh, Bhai, Sri Gur Pratdp Suraj Granth. Amritsar, 1927-35
3. Gian Singh, Giani, Twarikh Guru Khalsa [Reprint].Patiala, 1970 4
4. Macauliffe, M.A., The Sikh Religion. Oxford, 1909