Jenny Kanprilla, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2022
UI - Tesis Membership
Bromage, Arthur W.
Appleton-Century-Crofts,Inc., 1950
Buku Teks
Quah, Jon S. T., author
Talisman Pub, 2010
Buku Teks
Saragih, Samuel Martin Fernando, author
Fakultas Ilmu Administrasi Universitas Indonesia, 2019
UI - Skripsi Membership
Weston, Paul B., author
Prentoce-Hall, 1981
Buku Teks