APA (7 वां संस्करण) प्रशस्ति पत्र
Sotheby's. (1998). Sotheby's: London, Tuesday 13 and Wednesday 14 October 1998 : The Library of Peter Hopkirk : Central Asia, the Balkans and the Middle East. Sotheby's.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Sotheby's. Sotheby's: London, Tuesday 13 and Wednesday 14 October 1998 : The Library of Peter Hopkirk : Central Asia, the Balkans and the Middle East. Londres, Inglaterra: Sotheby's, 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Sotheby's. Sotheby's: London, Tuesday 13 and Wednesday 14 October 1998 : The Library of Peter Hopkirk : Central Asia, the Balkans and the Middle East. Sotheby's, 1998.
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