Tilman, R. O. The public services of the Federation of Malaya. University Microfilms.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTilman, Robert Oliver. The Public Services of the Federation of Malaya. Ann Arbor, Mich: University Microfilms.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTilman, Robert Oliver. The Public Services of the Federation of Malaya. University Microfilms.
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