Christie, David
UNSW Press, 1997
Buku Teks
Mausnes, Judith S.
W.B. Saunders , 1985
Buku Teks
Zhdanov, V., author
Foreign Languages Publishing House, [date of publication not identified]
Buku Teks
Peterson, Donald R.
Massachusetts Lexington Books, 1978
Buku Teks
Rogers Detels ... [et al.], editor
Oxford University Press, 2011
Buku Teks