Παραπομπή APA

E. J. Barrington & Willis. J, A. (1977). Man and the biology arid zones. Universiyt park press.

Παραπομπή Chicago Style

E. J. Barrington και Arthur Willis. J. Man and the Biology Arid Zones. London: Universiyt park press, 1977.

Παραπομπή MLA

E. J. Barrington και Arthur Willis. J. Man and the Biology Arid Zones. Universiyt park press, 1977.