Dubois, Bernard
Understanding the costumer: a European perspectiver
Prentice-Hall, 2000
 Buku Teks
Gibson, A. B.
Thinkers at work
Longmans, 1947
 Buku Teks SO
Luki Indra Malik
Perencanaan Digital Marketing untuk Kedai Fast Food Wings It! = Digital Marketing Planning for Fast Food Shop Wings It!
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2019
 UI - Tugas Akhir
Rasmussen, Nils
Financial business intelligence
Wiley, 2002
 Buku Teks
Competitive Intelligence and Decision Problems
Amos David
John Wiley, 2011
 Buku Teks