APA (7th ed.) Citation

Gray, A. Synoptical Flora of North America. Smithsonian Inst.

Chicago Style (17th ed.) Citation

Gray, Asa. Synoptical Flora of North America. Washington, DC: Smithsonian Inst.

MLA (9th ed.) Citation

Gray, Asa. Synoptical Flora of North America. Smithsonian Inst.

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