Cambridge University Press, 2018
eBooks
Jacob, Herbert, 1933-, author
Yale University Press, 1996
Buku Teks
Koopmans, Tim, author
Cambridge University Press, 2003
Buku Teks
edited by Christopher J. Whelan
Clarendon Press, 1990
Buku Teks
McWhinney, Edward, author
Martinus Nijhoff, 1986
Buku Teks