Troubetzkoy, N.S.
Librairei C. Klingksieck, 1949
Buku Teks SO
William J. Hardcastle, John Laver, Fiona E. Gibbon, editor
Wiley-Blackweell, 2013
Buku Teks SO
Dwi Putra Handi Pareh
Fakultas Ilmu Komputer Universitas Indonesia, 2009
UI - Skripsi Open
edited by James H. Potter
D. Van Nostrand, 1967
Buku Referensi
Pullum, Geoffrey K.
University of Chicago Press, 1986
Buku Teks