Artikel Jurnal
Levy, Michael, 1950-, author
[Publisher not identified], 2001
Multimedia
Hooks, Ivy F., author
[American Management Association, ], 2001
eBooks
Anzil Sifa Fauziah, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2019
UI - Skripsi (Membership)
Hotchkiss, George Burton, author
Alexander Hamilton Institute , 1961
Buku Teks