Boreth Ly, author
ISEAS/BUFS, 2018
Artikel Jurnal
editors, Chris Bissell, Chris Dillon
Springer, 2012
eBooks
Little, Brown And Company, 1971
Buku Teks
Halvorson, Heidi Grant-, 1973-, author
Plume Penguin Group, 2014
Buku Teks
Higham, Charles
River Books, 2002
Buku Teks