Zhdanov, V., author
Foreign Languages Publishing House, [date of publication not identified]
Buku Teks
Susser, Mervyn
Oxford University Press, 1973
Buku Teks
Coggon, David, author
BMJ Publ., 2003
Buku Teks
Peterson, Donald R.
Massachusetts Lexington Books, 1978
Buku Teks
Fox, John P., author
Macmillan, 1970
Buku Teks