Conrad P. Kottak, "What is hypodescent?"Diarsipkan 14 August 2010 di Wayback Machine., Human Diversity and "Race", Cultural Anthropology, Online Learning, McGraw Hill. Retrieved 21 April 2010.
Cooper, Erica Faye (2008). One 'speck' of imperfection—Invisible blackness and the one -drop rule: An interdisciplinary approach to examining Plessy v. Ferguson and Jane Doe v. State of Louisiana (Tesis). ProQuest193505748.
Conrad P. Kottak, "What is hypodescent?"Diarsipkan 14 August 2010 di Wayback Machine., Human Diversity and "Race", Cultural Anthropology, Online Learning, McGraw Hill. Retrieved 21 April 2010.