Nababan, P. W. J. (1981). A grammar of Toba-Batak. Dept. of Linguistics.
Lua i Stíl Chicago (17ú heag.)Nababan, P. W. J. A Grammar of Toba-Batak. Caberra: Dept. of Linguistics, 1981.
Lua MLA (9ú heag.)Nababan, P. W. J. A Grammar of Toba-Batak. Dept. of Linguistics, 1981.
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