Stein, Harold, author
Harcourt, Brace & World, 1952
Buku Teks
Friedrich, Carl J.
Mass. Graduate School of Pub. Adm., 1958
Buku Teks
Stillman, Richard J., author
Wadsworth and Cengage Learning, 2010
Buku Teks
Alexander R. Dawoody, editor
Springer, 2015
Buku Teks
edited by David F. Paulsen and Robert B. Denhardt
Dodd, Mead, 1973
Buku Teks