Aho, Alfred V.
Prentice-Hall, 1972
Buku Teks
Hopgood, F.R.A.
Macdonald, 1969
Buku Teks
Hopgood, F.R.A.
Macdonald , 1971
Buku Teks
Ratna Iriani
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1987
UI - Skripsi (Membership)
edited by Robert C. Berwick; Steven P. Abney; Carol Tenny
Kluwer Academic Publishers , 1991
Buku Teks