APA استشهاد

Whetham, E. H., & Currie, J. I. (1969). Economics of African countries. Cambridge University.

استشهاد بنمط شيكاغو

Whetham, Edith H., و Jean I. Currie. Economics of African Countries. London: Cambridge University, 1969.

MLA استشهاد

Whetham, Edith H., و Jean I. Currie. Economics of African Countries. Cambridge University, 1969.