Vincent, J. (1933). Descriptions of four new species and eighteen new sub-species of birds from Portuguese East Africa. Zenodo.
Chicago-Zitierstil (17. Ausg.)Vincent, Jack. Descriptions of Four New Species and Eighteen New Sub-species of Birds from Portuguese East Africa. Zenodo, 1933.
MLA-Zitierstil (9. Ausg.)Vincent, Jack. Descriptions of Four New Species and Eighteen New Sub-species of Birds from Portuguese East Africa. Zenodo, 1933.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.