Agranoff, Robert, author
Georgetown University Pres, 2012
Buku Teks
Daly, John L., 1952-, author
M.E. Sharpe, 2012
Buku Teks
Elliott, James, author
Routledge, 1997
Buku Teks
edited by Massimo Sargiacomo
McGraw-Hill, 2013
Buku Teks
Haveman, Robert H., author
John Wiley & Sons, 1976
Buku Teks