Ponnuswamy, S. (1989). Baridge Engineering S. Ponnuswamy. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Ponnuswamy, S. Baridge Engineering S. Ponnuswamy. McGraw-Hill, 1989.
Lua MLA (8ú heag.)Ponnuswamy, S. Baridge Engineering S. Ponnuswamy. McGraw-Hill, 1989.
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