Howard, H. (1971). Pliocene avian remains from Baja California. Zenodo.
Cita Chicago (17th ed.)Howard, Hildegarde. Pliocene Avian Remains from Baja California. Zenodo, 1971.
Cita MLA (9th ed.)Howard, Hildegarde. Pliocene Avian Remains from Baja California. Zenodo, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.