Welsch, Glenn A., author
Richard D. Irwin, 1982
Buku Teks
Beams, Floyd A., author
Prentice-Hall, 2000
Buku Teks
Engler, Calvin, author
Irwin, 1995
Buku Teks
Yorston, Robert Keith, Sir., author
The Law Book Co, 1978
Buku Teks
Zaki Baridwan, author
BP-FE-Yogyakarta, 1992
Buku Teks