Gillespie, L. J., & Armbruster, W. S. (1997). A contribution to the Guianan flora: Dalechampia, Haematostemon, Omphalea, Pera, Plukenetia, and Tragia (Euphorbiaceae) with notes on subfamily Acalyphoideae. Smithsonian Institution Press.
Chicago Style (17th ed.) CitationGillespie, Lynn J., and W. Scott Armbruster. A Contribution to the Guianan Flora: Dalechampia, Haematostemon, Omphalea, Pera, Plukenetia, and Tragia (Euphorbiaceae) with Notes on Subfamily Acalyphoideae. Washington, D.C.: Smithsonian Institution Press, 1997.
MLA (9th ed.) CitationGillespie, Lynn J., and W. Scott Armbruster. A Contribution to the Guianan Flora: Dalechampia, Haematostemon, Omphalea, Pera, Plukenetia, and Tragia (Euphorbiaceae) with Notes on Subfamily Acalyphoideae. Smithsonian Institution Press, 1997.