As. Nardju
Pustaka Islam, 1962
Buku Teks
Sindhu Galba, author
Departemen Pendidikan dan Kebudayaan, 1997
Buku Teks
Carter, Stephen L.
Basic Books, 1998
Buku Teks
Langford, Beverly Y., author
American Management Association, 2005
eBooks
Indah Mutiara Putri Fani, author
2019
UI - Tesis (Membership)