Percival, W. K. (1981). A grammar of the urbanised Toba-Batak of Medan. Department of Linguistics, Research School of Pacific Studies, Australian National University.
Chicago-referens (17:e uppl.)Percival, W. K. A Grammar of the Urbanised Toba-Batak of Medan. Canberra, A.C.T., Australia: Department of Linguistics, Research School of Pacific Studies, Australian National University, 1981.
MLA-referens (9:e uppl.)Percival, W. K. A Grammar of the Urbanised Toba-Batak of Medan. Department of Linguistics, Research School of Pacific Studies, Australian National University, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.