Daniels, Robert V.
Routledge, 1994
Buku Teks SO
edited by John Wilson Lewis
Stanford University Press, 1974
Buku Teks SO
East, Roger
Pinter Publishers, 1997
Buku Teks SO
edited by Maggie Toy
Academy Editions, 1996
Buku Teks SO
Lewis, Paul G.
Routledge, 2000
Buku Teks SO