Sommers, J. W. (1965). Bibliography of African geography, 1940-1964. s. n.].
Lua i Stíl Chicago (17ú heag.)Sommers, John W. Bibliography of African Geography, 1940-1964. [Hanover, N. H: s. n.], 1965.
Lua MLA (9ú heag.)Sommers, John W. Bibliography of African Geography, 1940-1964. s. n.], 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.