Gurmit Singh. (1966). Islam & Sikhism: A comparative study. Usha Institute of Religious Studies.
Lua i Stíl Chicago (17ú heag.)Gurmit Singh. Islam & Sikhism: A Comparative Study. Sirsa: Usha Institute of Religious Studies, 1966.
Lua MLA (8ú heag.)Gurmit Singh. Islam & Sikhism: A Comparative Study. Usha Institute of Religious Studies, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.