Selby, David
Cambridge University Press, 1988
Buku Teks
Murray, Rachel
Cambridge University Press, 2004
Buku Teks SO
edited by Richard P. Claude
John Hopkins University Press, 1976
Buku Teks SO
Welch, Claude E.
University of Pennsylvania, 1995
Buku Teks SO
edited by George Clack
[Publisher not identified], 1998
Buku Teks SO