Davis, Michael H.
Routledge, 1999
Buku Teks SO
Keeble, Richard
Routledge, 2001
Buku Teks SO
edited by Gary Edson
Routledge , 1997
Buku Teks SO
Ottensmeyer, Edward J.
McGraw-Hill, 1996
Buku Teks SO
Lockridge, Laurence S.
Cambridge University Press, 1989
Buku Teks SO