Cranston, Maurice
The Bodley Head, 1973
Buku Teks
Dumbauld, Edward
University of Oklahoma Press, 1957
Buku Teks
Kingdom, Elizabeth F., author
Edinburgh University Press, 1991
Buku Teks
Kingdom, Elizabeth F., author
Udinburgh University Press, 1991
Buku Teks
Abdullah Tan, author
Pengarah Jabatan Perhubungan Perusahaan Selangor , 2009
Buku Teks