Susswein, Donald B.
American Management Association , 1985
Buku Teks
Hoffman, William H., author
West Publishing, 1987
Buku Teks
edited by William H. Hoffman, Jr. ... [et al.]
South-Western College , 1999
Buku Teks
Gustafson, Charles H.
West Publishing Co., 1997
Buku Teks
The Brookings Institute, 1980
Buku Teks