Rani Lokayanti, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2018
UI - Tugas Akhir
Weimer, David L., author
Pearson Prentice Hall, 1989
Buku Teks
Weimer, David L., author
Routledge, 2014
Buku Teks
Bach, George Leland, author
Prentice Hall of India, 1977
Buku Teks
Bish, Robert L., author
McGraw-Hill Kogakusha, 1975
Buku Teks