Lowenfeld, Andreas F.
Matthew Bender and Company,Inc., 1972
Buku Teks
Larsen, Paul B.
Martinus Nijhoff pub., 2012
Buku Teks
Speciale, Raymond C.
McGraw-Hill, 2006
Buku Teks
Davies, Jack
West Publishing, 1975
Buku Teks
Wood, William
Percival Marshall, 1949
Buku Teks