Jelaskan Bacaan lebih lanjut dari Hosokawa Gracia

J. Laures, Two Japanese Christian Heroes, Rutland, VT: Bridgeway Press Books, 1959.

Charles Ralph Boxer, "Hosokawa Tadaoki and the Jesuits, 1587–1645" in Portuguese Merchants and Missionaries in Feudal Japan, 1543–1640, by Variorum Reprints (1986),