Safa, Helen I.; Safa, Helen I.. (1982). Towards a political economy of urbanization in third world countries/ Diedit oleh, Helen I. Safa. New Delhi :: Oxford University Press,.
Safa, Helen I.; Safa, Helen I.. Towards a political economy of urbanization in third world countries/ Diedit oleh, Helen I. Safa. New Delhi :: Oxford University Press,, 1982
Safa, Helen I.; Safa, Helen I.. Towards a political economy of urbanization in third world countries/ Diedit oleh, Helen I. Safa. New Delhi :: Oxford University Press,, 1982.