APA (7th ed.) Citation

Merrill, E. D. (1949). Index Rafinesquianus. Arnold Arboretum of Harvard University.

Chicago Style (17th ed.) Citation

Merrill, Elmer D. Index Rafinesquianus. Jamaica Plain, Mass.: Arnold Arboretum of Harvard University, 1949.

MLA (9th ed.) Citation

Merrill, Elmer D. Index Rafinesquianus. Arnold Arboretum of Harvard University, 1949.