Carlton, Katherine Tasheff
Gloucester, Ma Rockport Publisher 2001,
Buku Referensi
Veloso, Maria, author
[American Management Association, ], 2009
eBooks
Veloso, Maria, author
[American Management Association, ], 2013
eBooks
Tengku Ervan Naufal, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2019
UI - Skripsi (Membership)
Hoque, Reaz
McGraw-Hill, 1998
Buku Referensi