Bollig, M. (2007). Aridity, change and conflict in Africa: Proceedings of an international ACACIA conference held at Königswinter, Germany, October 1-3, 2003. Koln: Heinrich-Barth-Institut in Kooperation mit Universitat zu Koln.
استشهاد بنمط شيكاغوBollig, Michael. Aridity, Change and Conflict in Africa: Proceedings of an International ACACIA Conference Held At Königswinter, Germany, October 1-3, 2003. Koln: Heinrich-Barth-Institut in Kooperation mit Universitat zu Koln, 2007.
MLA استشهادBollig, Michael. Aridity, Change and Conflict in Africa: Proceedings of an International ACACIA Conference Held At Königswinter, Germany, October 1-3, 2003. Koln: Heinrich-Barth-Institut in Kooperation mit Universitat zu Koln, 2007.
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