ENGINEER, A. A. (1980). The origin and development of Islam. Orient Longman.
Lua i Stíl Chicago (17ú heag.)ENGINEER, Ashgar Ali. The Origin and Development of Islam. Bombay: Orient Longman, 1980.
Lua MLA (9ú heag.)ENGINEER, Ashgar Ali. The Origin and Development of Islam. Orient Longman, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.