↑ Donkin, Robin A. (2003). Between East and West: The Moluccas and the Traffic in Spices Up to the Arrival of Europeans. Diane Publishing Company. ISBN 0871692481.
↑ Remfry, P.M., (1997). Buckenham Castles, 'The Aubignys and the Fifth Crusade, 1218 to 1221'. ISBN 1-899376-05-4.
