editor, Gary Fromm
The Brookings Institution , 1971
Buku Referensi
Hoover Institution Press, 1996
Buku Teks
edited by Elizabeth Marting
American Management Association, 1956
Buku Teks
The Brookings Institute, 1980
Buku Teks
Ramdas, Ganga P.
Westview Press, 1991
Buku Teks