Vause, R.
McMillan Press , 1975
Buku Teks
Livingstone, John Leslie, author
Binarupa Aksara, 1994
Buku Teks
Houston,, Texas Accounting Publications of Scholars Book
Buku Teks
Davies, David B., author
McGraw-Hill, 1985
Buku Teks
Goch, Desmond
Pan Books , 1971
Buku Teks