Singh, S. (2006). A textbook of mathematics and statistics std XI (Commerce) paper II. Vishal.
Lua i Stíl Chicago (17ú heag.)Singh, S. A Textbook of Mathematics and Statistics Std XI (Commerce) Paper II. Mumbai: Vishal, 2006.
Lua MLA (9ú heag.)Singh, S. A Textbook of Mathematics and Statistics Std XI (Commerce) Paper II. Vishal, 2006.
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