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.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিStanley 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.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিStanley 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.
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