S. Samuththiram. (2007). Paper relationship (kagitha uravu). Maniwasagar Pathippagam.
Tohutoru Kātū Chicago (17th ed.)S. Samuththiram. Paper Relationship (kagitha Uravu). Chennai: Maniwasagar Pathippagam, 2007.
Tohutoro MLA (9th ed.)S. Samuththiram. Paper Relationship (kagitha Uravu). Maniwasagar Pathippagam, 2007.
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