Zahran, M. M. (1973). Challenges of the urban environment. Beirut Arab University.
Lua i Stíl Chicago (17ú heag.)Zahran, Mohsen Moharram. Challenges of the Urban Environment. Beirut: Beirut Arab University, 1973.
Lua MLA (9ú heag.)Zahran, Mohsen Moharram. Challenges of the Urban Environment. Beirut Arab University, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.