APA استشهاد

Houerou, H. N. (1979). Conservation in arid and semiarid zones. FAO.

استشهاد بنمط شيكاغو

Houerou, H N. Conservation in Arid and Semiarid Zones. Rome: FAO, 1979.

MLA استشهاد

Houerou, H N. Conservation in Arid and Semiarid Zones. FAO, 1979.