Verbatim text: I. Friis. 1993. Urticaceae. In: K. Kubitzki et al., eds. 1990+. The Families and Genera of Vascular Plants. 2+ vols. Berlin etc. Vol. 2, pp. 612-630.
Author: Friis, I.
Year: 1993
Title: Urticaceae
Editor: Kubitzki, K.
Book year: 1990
Book title: The Families and Genera of Vascular Plants
Book volume: 2+ vols
Volume: 2
Pages: 612–630