White, D. J.
North-Holland Publishing Company, 1976
Buku Teks
Thomas, Howard, author
Pitman, 1972
Buku Teks
Eden, Colin, author
Macmillan, 1975
Buku Teks
Ibnu Syamsi, author
Bina Aksara, 1989
Buku Teks
Radford, K.J., author
Prushin-Hall, 1974
Buku Teks