Papers presented at the celebration of the twentieth anniversary of the New York botanical garden Sept. 6-9, 1915 ...
APA Citation
New York Botanical Garden. (1916). Papers presented at the celebration of the twentieth anniversary of the New York botanical garden Sept. 6-9, 1915 ... New York.
MLA Citation
New York Botanical Garden. Papers Presented At the Celebration of the Twentieth Anniversary of the New York Botanical Garden Sept. 6-9, 1915 ... New York, 1916.
Warning: These citations may not always be complete (especially for serials).