edited by: John Halligan and Chris Paris

Longman Chesire, 1984

 Buku Teks SO

Schwarze, Tilman

Palgrave Macmillan Cham, 2023

 eBooks

Barlow, I.M.

Research Studies Press, 1981

 Buku Teks

edited by William J. Murin

Moore Publishing, 1982

 Buku Teks

Simanjuntak, Megawati

Management Research Center (MRC) Department of Management, Faculty of Economics, University of Indonesia and Philip Kotler Center, 2014

 Artikel Jurnal