Sweet & Maxwell, 2005
Buku Teks
Routledge, 2019
eBooks
Gavrilo Firman Martin, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2016
UI - Skripsi (Membership)
Joshua Indra Cantona, author
2018
UI - Skripsi (Membership)
Rodgers, Raymond, author
Alexander Hamiltion Institute, 1962
Buku Teks