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Wade, Geoff (translator). Yong-le: Year 4, Month 7, Day 25. Southeast Asia in the Ming Shi-lu: An Open Access Resource. Singapore: Asia Research Institute and the Singapore E-Press, National University of Singapore. Retrieved 21 August 2018.
Wade, Geoff (translator). Yong-le: Year 4, Month Intercalary 7, Day 2. Southeast Asia in the Ming Shi-lu: An Open Access Resource. Singapore: Asia Research Institute and the Singapore E-Press, National University of Singapore. Retrieved 21 August 2018.