Marcum, James A., author
Springer, 2012
eBooks
Battaly, Heather D., 1969-, author
Polity, 2015
Buku Teks
Hooke, Alexander E., author
Mayfield Publishing, 1999
Buku Teks
Soutphommasane, Tim, 1982-, author
Cambridge University Press, 2012
Buku Teks
National Academy Press, 1988
Buku Teks