Gultom, Eva Solina, author
2012
UI - Tesis (Open)
Tuuk, H.N. van der, author
Martinus Nijhoff, 1971
Buku Teks
Siahaan, Nalom, author
Fakultas sastra Universitas Indonesia, 1975
Buku Teks
Warneck, Joh., author
Martinus Nijhoff, 1977
Buku Referensi
Marbun, M.A., author
Balai Pustaka, 1987
Buku Referensi