Willem van der Molen
When dad and mom are away from home... panji paniba 11.20-45
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2021
 Artikel Jurnal
Maxwell, John C.
How to lead when your boss can't (or won't) = Cara mengambil alih peran kepemimpinan
MIC, 2020
 Buku Teks SO
Zemke, Ron
E-Service : 24 ways to keep your customers-when the competition is just a click away
Amacom, 2000
 Buku Teks SO
Burton, Hester
Castors away! / Hester Burton
Oxford University Press , 1962
 Buku Teks SO
Malouf, David, 1934-
Fly away Peter
Penguin Books, 1982
 Koleksi Publik