Ata-Ullah, Naazish, 'Stylistic Hybridity and Colonial Art and Design Education: A Wooden Carved Screen by Ram Singh', in T. Barringer and T. Flynn (eds) Colonialism and Object: Empire, Material Culture and the Museum (London: Routledge, 1998).
Bance, Peter, The Sikhs in Britain: 150 Years of Photographs (Stroud: Sutton Publishing, 2007)
Singh, Harbans, Encycopaedia of Sikhism (Patiala: Punjab University, 1995)