International Symposium on the Flora of Ethiopia and Eritrea Carlsberg Academy, Friis, I., & Ryding, O. (2001). Biodiversity research in the Horn of Africa region: Proceedings of the Third International Symposium on the Flora of Ethiopia and Eritrea at the Carlsberg Academy, Copenhagen, August 25-27, 1999. Royal Danish Academy of Sciences and Letters.
Chicagoスタイル(17版)引用形式International Symposium on the Flora of Ethiopia and Eritrea Carlsberg Academy, Ib Friis, , Olof Ryding. Biodiversity Research in the Horn of Africa Region: Proceedings of the Third International Symposium on the Flora of Ethiopia and Eritrea at the Carlsberg Academy, Copenhagen, August 25-27, 1999. Copenhagen: Royal Danish Academy of Sciences and Letters, 2001.
MLA(9版)引用形式International Symposium on the Flora of Ethiopia and Eritrea Carlsberg Academy, et al. Biodiversity Research in the Horn of Africa Region: Proceedings of the Third International Symposium on the Flora of Ethiopia and Eritrea at the Carlsberg Academy, Copenhagen, August 25-27, 1999. Royal Danish Academy of Sciences and Letters, 2001.