Siregar, Erwantho, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1995
UI - Skripsi (Membership)
Garland Publishing, 1984
Buku Teks
The University of Oklahoma, Center for Economic and Management Research , 1984
Buku Teks
Wilda Yunita, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2018
UI - Tugas Akhir
Dwiyanti, author
2019
UI - Tesis (Membership)