Sheffield, J. R., & Diejomaoh, V. P. (1972). Non-formal education in African development. African-American Institute.
Lua i Stíl Chicago (17ú heag.)Sheffield, James R., agus Victor P. Diejomaoh. Non-formal Education in African Development. New York: African-American Institute, 1972.
Lua MLA (8ú heag.)Sheffield, James R., agus Victor P. Diejomaoh. Non-formal Education in African Development. African-American Institute, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.