Suma, K. R. G. (2005). History of wet-rice lands in Kerala (3rd century BC to AD 12th century). MG University.
Trích dẫn kiểu ChicagoSuma, K Rajan Gurukkal. History of Wet-rice Lands in Kerala (3rd Century BC to AD 12th Century). Kottayam: MG University, 2005.
Trích dẫn MLASuma, K Rajan Gurukkal. History of Wet-rice Lands in Kerala (3rd Century BC to AD 12th Century). MG University, 2005.
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