Erhard, Ludwig, author
George Allen and Unwin, 1954
Buku Teks
Fischer, Fritz, author
W.W. Norton & Company, 1967
Buku Teks
Adelman, M.A., author
Johns Hopkins University Press, 1972
Buku Teks
Heijbroek, A.M.A., author
Rabobank International Group , 1996
Buku Teks
edited by John Zukowsky ; with contributions by Kennie Anne Laney-Lupton, Wojciech Lesnikowski, and John Zukowsky
Prestel-Verlag, 1994
Buku Teks