Friedrich, Carl J.
Rinhart , 1948
Buku Teks
Friedrich, Carl J.
Rinehart, 1948
Buku Teks
editor in-chief, John E. Jessup and Louise B. Ketz
Charles Scribner`s Sons, 1994
Buku Referensi
Friedrich, Carl J.
Mass. Graduate School of Pub. Adm., 1958
Buku Teks
Spanier, John
Frederck A. Praeger, 1968
Buku Teks