Wilbur, Terence H.
Amsterdam John Benjamins B.V. 1977
Buku Teks
Waverly Press, Inc. , Baltimore : Waverly Press
Majalah, Jurnal, Buletin
Hawaii : The Pasific and Asian Linguistics Institute University of Hawaii
Majalah, Jurnal, Buletin
Saussure, Ferdinand de, author
Geneve Georg & Cie, S.A., Corraterie 1946
Buku Teks
Fayetteville : University of Arkansas
Majalah, Jurnal, Buletin