Matthias Pilz
VS Verlag, 2012
eBooks
Batubara, Ery Rura P.
Program Pascasarjana Universitas Indonesia, 2005
UI - Tesis (Membership)
Silvius, G. Harold.
McKnight & McKnight , 1961
Buku Teks
Faitun Mariya
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2016
UI - Skripsi (Membership)
edited, S.G. Shapovalenko
Unesco, 1963
Buku Teks