Zahran, M. M. (1973). Challenges of the urban environment. Beirut Arab University.
Citazione stile Chigago Style (17a edizione)Zahran, Mohsen Moharram. Challenges of the Urban Environment. Beirut: Beirut Arab University, 1973.
Citatione MLA (9a ed.)Zahran, Mohsen Moharram. Challenges of the Urban Environment. Beirut Arab University, 1973.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.