edited by William J.Hardcastle and John Laaver
Blackwell Publishing, 1999
Buku Teks SO
Troubetzkoy, N.S., author
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, author
Fakultas Ilmu Komputer Universitas Indonesia, 2009
UI - Skripsi Open
edited by James H. Potter
D. Van Nostrand, 1967
Buku Referensi