Rydings, H. . . . . . . . . . . . A. (1976). A Hong Kong union catalogue: Works relating to Hong Kong in Hong Kong libraries. Centre of Asian Studies, University of Hong Kong.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRydings, H A. A Hong Kong Union Catalogue: Works Relating to Hong Kong in Hong Kong Libraries. Hongkong: Centre of Asian Studies, University of Hong Kong, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRydings, H A. A Hong Kong Union Catalogue: Works Relating to Hong Kong in Hong Kong Libraries. Centre of Asian Studies, University of Hong Kong, 1976.
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