1. Boechari, 1966. Preliminary report on the discovery of Old-Malay inscription at Sodjomerto. Madjalah ilmu-ilmu Sastra Indonesia 3. 2-3.
2. Boechari, 1984. Sejarah Nasional Indonesia, II. Jakarta: Balai Pustaka.
3. Bosch, F. D. K. 1961. Selected Studies in Indonesian Archaeology. The Hague. Martinus Nijhoff.
4. Coedès, G. 1968. The Indianized States of Southeast Asia. Honolulu: The University Press of Hawaii.
5. Dahm, B. 1969. Sukarno and the Struggle for Indonesian Independence. Cornell University Press.