edited by A.J. Arnaud and E. Kingdom
Aberdeen University Press, 1990
Buku Teks SO
Forsythe, David P., 1941-
University of Nebraska Press, 1983
Buku Teks
edited by Paula R. Newberg
New York University Press, 1980
Buku Teks SO
Soh, Chunghee Sarah
Westview Press, 1993
Buku Teks SO
Stokes, Windy
Poloty Press, 2005
Buku Teks SO