APA
Jones W. O., . (1972). Marketing staple food crops in tropical Africa. New York: Cornell University Press.
Chicago
Jones William O, . 1972. Marketing staple food crops in tropical Africa. New York: Cornell University Press.
Harvard
Jones W. O., . (1972). Marketing staple food crops in tropical Africa. New York: Cornell University Press.
MLA
Jones William O, . Marketing staple food crops in tropical Africa. New York: Cornell University Press. 1972.