Krieger, Morris
McGraw-Hill, 1985
Buku Teks
Gange, John
Public Administration Clearing House, 1953
Buku Teks
HInkle, Deborah, author
Glencoe/McGraw-Hill , 2002
Buku Teks
Fuori, William M., author
Prentice-Hall, 1994
Buku Teks
Hinkle, Deborah A., author
Glencoe McGraw-Hill, 1998
Buku Teks