Ponder, Randall D., author
EP Entrepreneur Press, 2005
Buku Teks
Poole, Jon, author
Financial World, 2011
Buku Teks
Burns, James McGregor, author
Harper and Row, 1978
Buku Teks
Manning, George, 1943-, author
McGraw-Hill, 2015
Buku Teks
M. Karjadi, author
Politeia, 1989
Buku Teks