^ 2.02.1Holloway, Thomas H. A companion to Latin American history. Malden, Mass.: Wiley-Blackwell. 2011: 7. ISBN 978-1-4443-3884-3.
^ 3.03.1Maunier, René; Lorimer, E. O. The Sociology of Colonies, Part 2: An Introduction to the Study of Race Contact.. Routledge. 2002: 203 [1949]. ISBN 978-1-3150-0711-3.