edited by Robert C. Berwick; Steven P. Abney; Carol Tenny
Kluwer Academic Publishers , 1991
Buku Teks SO
Ratna Iriani
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1987
UI - Skripsi Membership
Aho, Alfred V.
Prentice-Hall, 1972
Buku Teks SO
edited by Geoffrey Leech, Greg Myers and Jenny Thomas
Longman, 1995
Buku Teks SO
edited by Alexander Clark, Chris Fox and Shalom Lappin
Wiley-Blackwell, 2013
Buku Teks SO