Woolford, Donald Mark, author
University of Queensland Press, 1976
Buku Teks
edited by Ulli Beier
University of Queensland Press, 1980
Buku Teks
Robson, R.W., author
Pacific Publications PTY, 1954
Buku Teks
Wilson, Lindsay
McGraw-Hill , 1975
Buku Teks
Muflihuddaroini, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2023
UI - Tugas Akhir