Stanley Gibbons Publications Ltd. (1965). Stanley Gibbons whole world stamp catalogue: A priced catalogue of the postage stamps of the whole world, excluding varieties of paper, perforation, shade and watermark (13th ed.). Stanley Gibbons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStanley Gibbons Publications Ltd. Stanley Gibbons Whole World Stamp Catalogue: A Priced Catalogue of the Postage Stamps of the Whole World, Excluding Varieties of Paper, Perforation, Shade and Watermark. 13th ed. Stanley Gibbons, 1965.
एमएलए (9वां संस्करण) प्रशस्ति पत्रStanley Gibbons Publications Ltd. Stanley Gibbons Whole World Stamp Catalogue: A Priced Catalogue of the Postage Stamps of the Whole World, Excluding Varieties of Paper, Perforation, Shade and Watermark. 13th ed. Stanley Gibbons, 1965.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.