Chubb, C. (1919). Chubb on South American Birds. Zenodo.
Cita Chicago Style (17a ed.)Chubb, Charles. Chubb on South American Birds. Zenodo, 1919.
Cita MLA (9a ed.)Chubb, Charles. Chubb on South American Birds. Zenodo, 1919.
Precaución: Estas citas no son 100% exactas.