APA

Bircher A. G., Bircher W. H., .Encyclopedia of fruit trees and edible flowering plants in Egypt and the subtropics. Cairo: American Univeristy of Cairo Press.

Chicago

Bircher Alfred G, Bircher Warda H, .Encyclopedia of fruit trees and edible flowering plants in Egypt and the subtropics. Cairo: American Univeristy of Cairo Press.

Harvard

Bircher A. G., Bircher W. H., .Encyclopedia of fruit trees and edible flowering plants in Egypt and the subtropics. Cairo: American Univeristy of Cairo Press.

MLA

Bircher Alfred G, Bircher Warda H, .Cairo: American Univeristy of Cairo Press. .