Taqiyyah
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014
UI - Skripsi (Membership)
Hillway, Tyrus
Houghton Miffiln, 1964
Buku Teks
Freedman, Paul
Public Affairs Press, 1950
Buku Teks
Fortune
McGraw-Hill, 1956
Buku Teks
Depdikbud, 1983
Buku Teks