APA (7th ed.) Citation

Candolle, C. d. (1920). New species of piper from Panama. Smithsonian Inst.

Chicago Style (17th ed.) Citation

Candolle, Casimir de. New Species of Piper from Panama. Washington, DC: Smithsonian Inst, 1920.

MLA (9th ed.) Citation

Candolle, Casimir de. New Species of Piper from Panama. Smithsonian Inst, 1920.

Warning: These citations may not always be 100% accurate.