Reich, Robert B.
Boston, 2002
Buku Teks
Peters, B. Guy, author
CQ Press, , 2004
Buku Teks
Steinberg, Sheldon S., author
Rosda Jayaputra, 1998
Buku Teks
CQ Pres, 2003
Buku Teks
Medvic, Stephen K., author
Routledge, Taylor & Francis Group, 2018
Buku Teks