Sitinjak, Ellis Veronika, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2018
UI - Tesis (Membership)
Dewi Hariyani, author
2018
UI - Tesis (Membership)
Hamonangan, Fernando, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2017
UI - Skripsi (Membership)
Rose, T.G.
Sir Isaac Pitman & Sons, Ltd., 1959
Buku Teks
Vause, R.
McMillan Press , 1975
Buku Teks