Smithsonian Institution. Office of the Secretary & Mackenzie, K. K. (1915). Two new sedges from Southwestern U.S. [publisher not identified].
Chicago Style (17th ed.) CitationSmithsonian Institution. Office of the Secretary and Kenneth K. Mackenzie. Two New Sedges from Southwestern U.S. Washington, D.C.: [publisher not identified], 1915.
MLA (9th ed.) CitationSmithsonian Institution. Office of the Secretary and Kenneth K. Mackenzie. Two New Sedges from Southwestern U.S. [publisher not identified], 1915.
Warning: These citations may not always be 100% accurate.