Engst, Adam C., author
Hayden Books, 1995
Buku Teks
R. Haryo Wisanggeni, author
Fakultas Teknik Universitas Indonesia, 2006
UI - Skripsi (Membership)
Crittendon, Robert, author
[American Management Association;, ], 2002
eBooks
Artikel Jurnal
Muchammad Zulfikar Ramadhan, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2012
UI - Skripsi (Open)