Nababan, P. W. J. A Grammar of Toba-Batak. Pacific Linguistics Series D – No. 37. Canberra: Dept. of Linguistics, Research School of Pacific Studies, The Australian National University. 1981. doi:10.15144/pl-d37. hdl:1885/145092.
參考資料
^Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian (编). Batak Toba. Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History. 2016.
^Bauer, Laurie. The Linguistics Student's Handbook. Edinburgh: Edinburgh University Press. 2007.