Heyel, Carl, author
American Management Association, 1960
Buku Teks
Albers, Henry, author
Wiley, 1974
Buku Teks
Mahoney, Thomas A., author
Prentice-Hall, 1961
Buku Teks
Allen, Louis A., author
McGraw-Hill Kogakusha, 1958
Buku Teks
Weske, Mathias, author
Springer, 2007
Buku Teks