Jordan, Jason
McGraw-Hill, 2012
Buku Teks
Still, Richard R.
Prentice Hall International, 1988
Buku Teks
Jones, John G.
Alexander Hamilton Institute, 1961
Buku Teks
Stroh, Thomas F.
McGraw-Hill c. , 1978
Buku Teks
Stanton, William J.
Richard D. Irwin, 1978
Buku Teks