Jeffry Andreas
Fakultas Ekonomi dan Bisinis Universitas Indonesia, 2021
UI - Skripsi Membership
Omar, Ogenyi
Financial Times Management, 1999
Buku Teks
Cox, Roger
Financial Times Prentice Hall, 2000
Buku Teks
Berman, Barry
Prentice-Hall, 2001
Buku Teks
Din, Rasshied
Conran Octopus, 2000
Buku Referensi