Haag, Stephen, author
McGraw-Hill Irwin, 2006
Buku Teks
Moschella, David, author
Harvard Bussiness School Press, 2003
Buku Teks
Nissen, Mark, author
Igi Global, 2014
Buku Teks
Franz, Peter, author
McGraw-Hill, 2012
Buku Teks
Hollander, Anita Sawyer, author
Irwin McGraw-Hill , 2000
Buku Teks