edited by R.W. Clower
Pergamon Press, 1969
Buku Teks
Rousseas, Stephen, author
Alfred A. Knopf, 1972
Buku Teks
Hansen, Alvin Harvey, 1887-1975, author
Amacom, 1977
Buku Teks
Hansen, Alvin Harvey, 1887-1975, author
McGraw-Hill, 1949
Buku Teks
Walsh, Carl E., author
MIT Press, 2010
Buku Teks