Keat, Paul G
Managerial Economics: economics tools for today's decision makers
Pearson Education International, 2003
 Buku Teks
Dingle, J.
Project management: orientation for decision makers
Arnold , 1997
 Buku Teks
Keat, Paul G
Managerial economics: economic tools for today's decision makers/ Paul G Keat : Phillip K. Y. Young
Prentice Hall International, 2000
 Buku Teks
Manajemen & Usahawan Indonesia : jembatan ilmu dan praktek manajemen
Jakarta : Lembaga Manajemen Fakultas Ekonomi Universitas indonesia
 Majalah, Jurnal, Buletin
Korea today
Pyongyang : The Foreign Languages Publishing House
 Majalah, Jurnal, Buletin