* Louise Levathes, "When China Ruled the Seas: The Treasure Fleet of the Dragon Throne, 1405–1433", Oxford University Press, 1997, trade paperback, ISBN 0-19-511207-5
* Louise Levathes, "When China Ruled the Seas: The Treasure Fleet of the Dragon Throne, 1405–1433", Oxford University Press, 1997, trade paperback, ISBN 0-19-511207-5