Raymond, Thomas Cicchino
McGraw-Hill, 1964
Buku Teks
Craig, Harold Farlow
The Law Book, 1979
Buku Teks
Kelley, Pearce Clement
Prentice-Hall, 1952
Buku Teks
Smith, George Albert
Richard D. Irwin, 1960
Buku Teks
Washington, D.C. International Cooperation Administration s.a,
Buku Teks