APA ציטוט

Whetham, E. H. (1969). The economics of African countries. London: Cambridge.

Trích dẫn kiểu Chicago

Whetham, Edith H. The Economics of African Countries. London: Cambridge, 1969.

ציטוט MLA

Whetham, Edith H. The Economics of African Countries. London: Cambridge, 1969.