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
Rogers, A.J.
Dryden Press, 1972
Buku Teks
Saverianus P.
Fakultas Teknik Universitas Indonesia, 2002
UI - Skripsi Membership