Schlesinger, Rudolf B.
The Foundation Press, 1950
Buku Teks
Schlesinger, Rudolf B.
The Foundation Press, 1950
Buku Klasik
Mehren, Arthur Taylor von, author
Little,Brown and Company, 1957
Buku Teks
Cappeletti, Mauro
The Bobbs - Merrill Company,INC, 1979
Buku Teks
Schlesinger, Rudolf B.
Stevens & Sons , 1960
Buku Klasik