Solomon, Michael R.
Marketing : real people, real choices
Pearson education, 2015
 Buku Teks
Lovelock, Christopher H.
Services marketing : people, technology, strategy
Prentice-Hall, 2005
 Buku Teks
Lovelock, Christopher H.
Services marketing : people, technology, strategy
Pearson Education , 2011
 Buku Teks
Oberlin, Loriann Hoff
Writing for quick cash: turn your way with words into real money
[American Management Association, ], 2004
 eBooks
Ellamanda Sita Wardhani
Penelitian terhadap komitmen-retensi anggota dalam asosiasi Real Estat Indonesia (REI) DPD DKI Jakarta
Universitas Indonesia, 2004
 UI - Tesis Membership