Ricky Eka
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2023
UI - Tesis Membership
Newlyn, W.T.
Oxford University Press, 1962
Buku Teks
Niehans, Jurg
John Hopkins University Press, 1980
Buku Teks SO
Rogers, A.J.
Dryden Press, 1972
Buku Teks SO
Bain, A.D.
Penguin Books, 1970
Buku Teks