Simonds, John Ormsbee, author
McGraw-Hill , 1994
Buku Teks
Cohen, Nahoum, author
McGraw-Hill, 2001
Buku Teks
edited by Anthony Gar-On Yeh and Mee Kam Ng.
Routledge, 2018
Buku Teks
edited by Ellen van Bueren, Hein van Bohemen, Laure Itard, Henk Visscher,
Springer, 2012
Buku Teks
Chusnul Mariyah, author
Department of Government, The University of Sydney, 1998
Buku Teks