Kerkhof, P. (1990). Agroforestry in Africa: A survey of project experience. Panos.
Lua i Stíl Chicago (17ú heag.)Kerkhof, Paul. Agroforestry in Africa: A Survey of Project Experience. London: Panos, 1990.
Lua MLA (9ú heag.)Kerkhof, Paul. Agroforestry in Africa: A Survey of Project Experience. Panos, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.