Gastil, Raymon W.
Princeton Architectureal Press, 2002
Buku Teks SO
Aldine Publishing, 1970
Buku Teks SO
Irena Omelaniuk
Springer, 2012
eBooks
Wolfe, Gerard R.
McGraw-Hill, 1994
Buku Referensi
Appleton, Julian J.
Practicing Law Institute, 1947
Buku Teks