Seckler-Hudson, Catheryn, author
United State Information Service, 1959
Buku Teks
Gallagher, Michael, author
McGraw-Hill, 2011
Buku Teks
Satya Arinanto, author
The University of Melbourne Law School, 1995
Buku Teks
Kenneth Janda, Jeffrey M. Berry, Jerry Goldman, Deborah J. Schildkraut, Paul Manna
Cengage Learning, 2018
Buku Teks
Cole, John, author
BBC Book 1987, 1987
Buku Teks