Ceṅkaṟpaṭṭu āvaṇaṅkaḷ: Patiṉeṭṭām nūṟṟāṇṭiṉ kirāmacamūkamum varuvāyum. Vol. Book 2, Series 1. History Society Knowledge: வரலாறு சமூகம் சிந்தனை. Palm Leaf Press, 2024. Accessed March 15, 2025. http://palmleafpress.net/index.php/plp/catalog/book/21.