Ambler, John S. «Historical Perspectives on Sawah Cultivation and the Political and Economic Context for Irrigation in West Sumatra». Indonesia. Southeast Asia Program Publications at Cornell University, 46, 46, 1988, pàg. 39–77. DOI: 10.2307/3351044. JSTOR: 3351044.
Colombijn, Freek «A Moving History of Middle Sumatra, 1600–1870». Modern Asian Studies, 39, 1, 2005, pàg. 1–38. DOI: 10.1017/S0026749X04001374.
jstor.org
Ambler, John S. «Historical Perspectives on Sawah Cultivation and the Political and Economic Context for Irrigation in West Sumatra». Indonesia. Southeast Asia Program Publications at Cornell University, 46, 46, 1988, pàg. 39–77. DOI: 10.2307/3351044. JSTOR: 3351044.
