Weinberger, Paul E., author
Macmillan, 1974
Buku Teks
Muhammad Ananta Firdaus, author
2017
UI - Tesis (Membership)
Smith, N.J.
Longman Cheshire , 1985
Buku Teks
Rifatul Mahmudah, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2022
UI - Tesis (Membership)
Baugh, W.E.
MacMillan Press, 1977
Buku Teks