Brinkerhoff, David B., author
Wadsworth, Cengage Learning, 2014
Buku Teks
Gujarati, Damodar N., author
McGraw-Hill, 1992
Buku Teks
Bodie, Zvi, author
McGraw-Hill, Irwin, 2001
Buku Teks
Ebert, Ronald J., author
Prentice-Hall, 2003
Buku Teks
Anthony, Robert N. (Robert Newton), 1916-2006, author
Addison-Wesley, 1988
Buku Teks