.Shawky, G. A. (1999). Detecting changes in fertility: In Algeria, Egypt and yemen. Cairo Demographic Center.
Lua i Stíl Chicago (17ú heag.).Shawky, Gihan A. Detecting Changes in Fertility: In Algeria, Egypt and Yemen. Cairo: Cairo Demographic Center, 1999.
Lua MLA (9ú heag.).Shawky, Gihan A. Detecting Changes in Fertility: In Algeria, Egypt and Yemen. Cairo Demographic Center, 1999.