நூலகம்> தேசிய கல்வி நிறுவகம்
Ranpathwila P., .මානව හිමිකම්. Colombo: University of Colombo.
Ranpathwila Piyadasa, .මානව හිමිකම්. Colombo: University of Colombo.
Ranpathwila Piyadasa, .Colombo: University of Colombo. .
Library Network, National Institute of Education (NIE) Maharagama