Wieke Wiana, author
Universitas Indonesia, 2008
UI - Tesis (Open)
Cohen, William A., author
American Management Association, 2006
eBooks
Harari, Oren, author
Gramedia Pustaka Utama,, 2003
Buku Teks
Slater, Robert, author
McGraw-Hill, 1999
Buku Teks
Slater, Robert, author
Richard D. Irwin, 1994
Buku Teks