edited by Peter Taylor-Gooby
Oxford University Press, 2013
Buku Teks
Kayden, Jerold S.
John Wiley & Sons, 2000
Buku Teks SO
edited by Wil A.H. Thissen and Warren E. Walker
Springer, 2013
Buku Teks SO
Fifi Junita
University of Indonesia, Faculty of Law, 2015
Artikel Jurnal
Wolfe, Gerard R.
McGraw-Hill, 1994
Buku Referensi