Brock,Horace R
McGraw-Hill, 1989
Buku Teks
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