Younghusband, G. J. S. (2004). The Philippines and round about. National Historical Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रYounghusband, Geoge John Sir. The Philippines and Round About. Manila: National Historical Institute, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रYounghusband, Geoge John Sir. The Philippines and Round About. National Historical Institute, 2004.
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