Sinhal, O. P. (1989). A textbook of mathematics. General Printers.
Lua i Stíl Chicago (17ú heag.)Sinhal, O. P. A Textbook of Mathematics. Mumbai: General Printers, 1989.
Lua MLA (8ú heag.)Sinhal, O. P. A Textbook of Mathematics. General Printers, 1989.
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