Hammer, Lawrence H., author
South Western Publishing, 1994
Buku Teks
Carter, author
Cengage Learning, 2009
Buku Teks
Blocker, John G., author
McGraw-Hill, 1948
Buku Teks
Blocker, John G., author
Tata McGraw-Hill, 1972
Buku Teks
Deakin, Edward B., author
Richard D. Irwin, 1987
Buku Teks