Friis, I., & Balslev, H. (2017). Tropical plant collections: Legacies from the past? essential tools for the future? :proceedings of an international symposium held by The Royal Danish Academy of Sciences and Letters in Copenhagen, 19th-21st of May, 2015. Det Kongelige Danske Videnskabernes Selskab.
Cita Chicago (17th ed.)Friis, IB, i Henrick Balslev. Tropical Plant Collections: Legacies from the Past? Essential Tools for the Future? :proceedings of an International Symposium Held by The Royal Danish Academy of Sciences and Letters in Copenhagen, 19th-21st of May, 2015. Copenhagen, Denmark: Det Kongelige Danske Videnskabernes Selskab, 2017.
Cita MLA (9th ed.)Friis, IB, i Henrick Balslev. Tropical Plant Collections: Legacies from the Past? Essential Tools for the Future? :proceedings of an International Symposium Held by The Royal Danish Academy of Sciences and Letters in Copenhagen, 19th-21st of May, 2015. Det Kongelige Danske Videnskabernes Selskab, 2017.