Stewart, Rosemary, author
Prentice-Hall, 1982
Buku Teks
Webber, Ross A., author
Richard D. Irwin, 1981
Buku Teks
Calhoon, Richard P.
McGraw-Hill, 1956
Buku Teks
Rothwell, William J., 1951-, author
American Management Association, 2010
eBooks
Stewart, Rosemary, author
Prentice-Hall, 1982
Buku Teks