Sembiring, Riswanto
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2010
UI - Tesis Open
Taylor, Philip E.
Macmillan, 1953;1948
Buku Teks
Fisher, Ronald C.
Routledge, 2022
eBooks
Maxwell, James C.
Henry Helt, 1955
Buku Teks
Ilersic, A. R.
Staples Press Ltd, 1955
Buku Teks