APA

m. m.El-Imam, . (1962). models used in derafting the 20-years plan(1959-1978). cairo: inp.

Chicago

m. m.El-Imam, . 1962. models used in derafting the 20-years plan(1959-1978). cairo: inp.

Harvard

m. m.El-Imam, . (1962). models used in derafting the 20-years plan(1959-1978). cairo: inp.

MLA

m. m.El-Imam, . models used in derafting the 20-years plan(1959-1978). cairo: inp. 1962.