Ahmad Safwat, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2015
UI - Skripsi (Membership)
edited by Gavin W. Jones and Terence H. Hull
Institute od Southeast Asia Studies (ISEAS), 1997
Buku Teks
Kendeigh, S. Charles
Prentice-Hall, 1975
Buku Teks
Brightbill, Charles K.
Prentice-Hall, 1961
Buku Teks
Nilson, Arthur H., author
Mc Graw Hill, 2004
Buku Teks