Dubois, Bernard
Understanding the costumer: a European perspectiver
Prentice-Hall, 2000
 Buku Teks SO
Gibson, A. B.
Thinkers at work
Longmans, 1947
 Buku Teks SO
Malhotra, Naresh K.
Basic marketing research : a decision-making approach
2006
 Multimedia
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
Qualitative research
edited by Alan Bryman, Robert G. Burgess
SAGE Publication, 1999
 Buku Teks SO