Roscoe, Edwin Scott, author
Richard D. Irwin, 1959
Buku Teks
British Institute of Management , 1951
Buku Teks
Lamb, Richard G., author
Prentice-Hall, 1995
Buku Teks
Anthony, Robert N. (Robert Newton), 1916-2006, author
Harvard University, 1952
Buku Teks
Ziegler, Raymond J.
John Wiley & Sons, 1962
Buku Teks