González de Clavijo, Ruy; Estrada, Francisco López (1999), [1] (页面存档备份,存于互联网档案馆) Volume 242 of Clásicos Castalia Series (in Spanish), Editorial Castalia, p. 19, ISBN 84-7039-831-8
González de Clavijo, Ruy; Estrada, Francisco López (1999), [1] (页面存档备份,存于互联网档案馆) Volume 242 of Clásicos Castalia Series (in Spanish), Editorial Castalia, p. 19, ISBN 84-7039-831-8