Herndon, David N.
Saunders Elsevier, 2012
Buku Teks
Harvard Business Review Press, 2013
Buku Teks
Simeon, Richard
McGill Queen's University Press, 1977
Buku Teks
Gordman, Robert, author
Gramedia, 2007
Buku Teks
Dobson, James
Kingsway Pubb., 1987
Buku Teks