Wurm, Stephen Adolphe, 1922-
Narr, 1982
Buku Teks SO
Versteegh, Kees
Faculty of Humanities University of Indonesia, 2015
Artikel Jurnal
John Bowden
University of Indonesia, Faculty of Humanities, 2012
Artikel Jurnal
Lyons, John
Cambridge University Press, 1991
eBooks
Capell, A.
Linguistic Circle of Canberra, 1971
Buku Teks SO