Hani Khotijah Susilowati, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2010
UI - Tesis (Open)
Noor Khayati, author
Fakultas Eknonomi dan Bisnis Universitas Indonesia, 2010
UI - Tesis (Open)
Lindsay, David, author
Longman, 1995
Buku Teks
Silvius, G. Harold.
McKnight & McKnight , 1961
Buku Teks
Miles, James
Science Research Associaties, Inc., 1982
Buku Teks