^"Norbert Kraft". Canadian Encyclopedia. Historica-Dominion. مؤرشف من الأصل في 2013-11-04. اطلع عليه بتاريخ 2012-12-23.
^Maurice J. Summerfield: The Classical Guitar. Its Evolution, Players, and Personalities Since 1800 (5th edition, Blaydon-on-Tyne: Ashley Mark, 2002), p. 170–171.
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