APA (7th ed.) Citation

Palmer, H. R. (1970). The Bornu Sahara and Sudan. Negro Universities Press.

Chicago Style (17th ed.) Citation

Palmer, H. R. The Bornu Sahara and Sudan. New York: Negro Universities Press, 1970.

MLA (9th ed.) Citation

Palmer, H. R. The Bornu Sahara and Sudan. Negro Universities Press, 1970.