Crawford, Richard, author
Harper Bussines, 1991
Buku Teks
Chowdhury, Subir, author
Financial Times Prentice Hall , 2002
Buku Teks
Fellner, William, 1905-, author
McGraw-Hill, 1960
Buku Teks
Choudhury, Masudul Alam, 1948-, author
Routledge, 2017
eBooks
Kail, Robert V., author
W.H. Freeman, c1985
Buku Teks