edited, Bernard Berelson
University of Chicago, [date of publication not identified]
Buku Teks
Dong-Kyun Park, author
ESCAP, 2017
Artikel Jurnal
Deborah R. McFarlane, editor
Jones & Bartlett Learning, 2015
Buku Teks
El-Sayed, Abdulrahman M., author
Oxford University Press, 2017
eBooks
Heller, Richard F., author
Oxford University Press, 2006
Buku Teks