Sidhwa, R. S. (1978). Sidhwa's catalogue, Pakistan stamps, errors & varieties, 1947-78. Kermin R. Sidhwa.
Lua i Stíl Chicago (17ú heag.)Sidhwa, Rustam S. Sidhwa's Catalogue, Pakistan Stamps, Errors & Varieties, 1947-78. Lahore: Kermin R. Sidhwa, 1978.
Lua MLA (8ú heag.)Sidhwa, Rustam S. Sidhwa's Catalogue, Pakistan Stamps, Errors & Varieties, 1947-78. Kermin R. Sidhwa, 1978.
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