Wardle, P. (1970). Guide to english embroidery. Her Majesty's Stationary Office.
Lua i Stíl Chicago (17ú heag.)Wardle, Patricia. Guide to English Embroidery. London: Her Majesty's Stationary Office, 1970.
Lua MLA (9ú heag.)Wardle, Patricia. Guide to English Embroidery. Her Majesty's Stationary Office, 1970.
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