Charam, Ram, author
Bhuana Ilmu Populer, 2008
Buku Teks
Vardaman, George T.
Auerbach Publishers, 1973
Buku Teks
Mohammad Hamsal, author
The Ary Suta Center, 2014
Artikel Jurnal
Bellinda Jasmine Miranda, author
Fakultas Ilmu Administrasi Universitas Indonesia, 2022
UI - Skripsi (Membership)
Elex Media Komputindo, 1991
Buku Teks