Parker, Michael, 1958-, author
Cambridge University Press, 2012
Buku Teks
Brooks, Elizabert C, author
Jones & Bartlett Learning, 2013
Buku Teks
edited by Hugh LaFollette and Ingmar Persson
Wiley Blackwell, 2013
Buku Teks
Tucker, Edwin W.
Irwin, 1992
Buku Teks
Harries, Karsten, author
MIT Press, 1997
Buku Teks