Odmark, John
Amsterdam John Benjamins 1980
Buku Teks
Knowles, Murray
Routledge, 1996
Buku Teks SO
Shepherd, Valerie
Routledge, 1994
Buku Teks SO
McLaughlin, Thomas
Harcourt Brace Javanovich, 1989
Buku Teks SO
edited by Christopher Brumfit and Ronald Carter
Oxford University Press, 1987
Buku Teks SO