APA

(1979). The Population situation in the ECWA region Yemen. Beirut: ECWA.

Chicago

1979. The Population situation in the ECWA region Yemen. Beirut: ECWA.

Harvard

(1979). The Population situation in the ECWA region Yemen. Beirut: ECWA.

MLA

The Population situation in the ECWA region Yemen. Beirut: ECWA. 1979.