Smithsonian Institution. Office of the Secretary & DeCandolle, C. (1920). New species of Piper from Panama. [publisher not identified].
Chicago Style (17th ed.) CitationSmithsonian Institution. Office of the Secretary and Casimir DeCandolle. New Species of Piper from Panama. Washington, D.C.: [publisher not identified], 1920.
MLA (9th ed.) CitationSmithsonian Institution. Office of the Secretary and Casimir DeCandolle. New Species of Piper from Panama. [publisher not identified], 1920.
Warning: These citations may not always be 100% accurate.