APA

Bangs O., .On some new or rare birds from the Sierra Nevada de Santa Marta, Colombia. : .

Chicago

Bangs Outram, .On some new or rare birds from the Sierra Nevada de Santa Marta, Colombia. : .

Harvard

Bangs O., .On some new or rare birds from the Sierra Nevada de Santa Marta, Colombia. : .

MLA

Bangs Outram, .: . .