Heere, Wybo P.
Oceana, 1972
Buku Teks SO
White, Irvin L.
University of Arizona Press, 1972
Buku Teks SO
Martin Bartels ...[et al.]
Metzner, 1981
Buku Teks SO
Kemp, Herman C.
KITLV Press, 1990
Buku Referensi
Nagelkerke, Gerard A.
Leiden Library of the Royal Institute of Linguistics and Anthropology 1982
Buku Referensi