Lang, Margaret
Routledge, 2001
Buku Teks
edited by Vic Barnett
John Wiley & Sons, 1981
Buku Teks
Gilbert, Joseph
Van Nostrand Reinhold, 1978
Buku Teks
Lang, Margaret
Routledge, 2001
Buku Teks
Anderson, Alan J.B., Author
Chapman & Hall, 1994
Buku Teks