↑Phillips, William D., and Carla Rahn Phillips. The Worlds of Christopher Columbus. Cambridge: Cambridge University Press, 1992. Page 9. "Even with less than a complete record, however, scholars can state with assurance that Columbus was born in the republic of Genoa in northern।taly, although perhaps not in the city itself, and that his family made a living in the wool business as weavers and merchants. ... The two main early biographies of Columbus have been taken as literal truth by hundreds of writers, in large part because they were written by individuals closely connected to Columbus or his writings. ... Both biographies have serious shortcomings as evidence."
↑Bergreen, Lawrence (2012). Columbus The Four Voyages, 1493–1504. Penguin Group USA. ISBN978-0-14-312210-4.
↑Encyclopædia Britannica, 1993 ed., Vol. 16, pp. 605ff / Morison, Christopher Columbus, 1955 ed., pp. 14ff