Atal Malviya
Routledge, 2019
eBooks
Holden, Greg
American Management Association, 2006
eBooks
Flesch, Rudolf
Harper & Brothetrs, 1960
Buku Teks
Syarifah Fatimah Fitria
Fakultas Eknonomi dan Bisnis Universitas Indonesia, 2018
UI - Tesis (Membership)
Antoni Ludfi Arifin
Gramedia Pustaka Utama, 2012
Buku Teks