Smithsonian Institution. Office of the Secretary. (1913). Two new subspecies of birds from slopes of Mount Pirri, eastern Panama. [publisher not identified].
Chicago Style (17th ed.) CitationSmithsonian Institution. Office of the Secretary. Two New Subspecies of Birds from Slopes of Mount Pirri, Eastern Panama. Washington, D.C.: [publisher not identified], 1913.
MLA (9th ed.) CitationSmithsonian Institution. Office of the Secretary. Two New Subspecies of Birds from Slopes of Mount Pirri, Eastern Panama. [publisher not identified], 1913.
Warning: These citations may not always be 100% accurate.