Kerkhof, P. (1990). Agroforestry in Africa: A survey of project experience. Panos.
芝加哥风格引文Kerkhof, Paul. Agroforestry in Africa: A Survey of Project Experience. London: Panos, 1990.
MLA引文Kerkhof, Paul. Agroforestry in Africa: A Survey of Project Experience. Panos, 1990.
警告：这些引文格式不一定是100％准确.