Morrison, Charles E., author
Martin Press, 1978
Buku Teks
Christy, Arthur
The John Day Company, 1945
Buku Teks
Beer, Lawrence W.
School of Law University of Maryland, 1978
Buku Teks
Kazuo, Ogura, author
International House of Japan , 2015
Buku Teks
edited by Wim Stokhof, Paul van der Velde
Curzon Press, 2001
Buku Teks