Não informado. (1931). The Nigerian field. Nigerian Field Society.
Lua i Stíl Chicago (17ú heag.)Não informado. The Nigerian Field. London: Nigerian Field Society, 1931.
Lua MLA (8ú heag.)Não informado. The Nigerian Field. Nigerian Field Society, 1931.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.