Παραπομπή APA

Foster, P. W. (1967). Research on agricultural development in North-Africa. New york.

Παραπομπή Chicago Style

Foster, Philip W. Research on Agricultural Development in North-Africa. Agricultural development council,inc: New york, 1967.

Παραπομπή MLA

Foster, Philip W. Research on Agricultural Development in North-Africa. New york, 1967.