↑Friesen, V. L. (2002. július 1.). „Molecular Support for Species Status of the Nazca Booby”. The Auk, Kingston, Ontario 119 (3), 820–826. o, Kiadó: Department of Biology, Queen's University. DOI:[0820:MSFSSO2.0.CO;2 10.1642/0004-8038(2002)119[0820:MSFSSO]2.0.CO;2]. (Hozzáférés: 2008. november 13.)