Poe, Jerry B., author
Richard D. Irwin, 1972
Buku Teks
McNaughton, Wayne L. (Wayne Leslie), 1902-, author
Wiley, 1970
Buku Teks
Kapp, K. William (Karl William), 1910-1976, author
Publishing House , 1963
Buku Teks
A Harvard Business Review Paperback, 2003
Buku Teks
Abrahamsen, Martin A.
McGraw-Hill, 1976
Buku Teks