Artikel Jurnal
Tyson, Lois, 1950-
Routledge, 2006
Buku Teks
edited and with an introd. by Josue V. Harari
Cornell University Press, 1979
Buku Teks
Asim Gunawan
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1997
UI - Laporan Penelitian
Richards, I.A.
Routledge, 2001
Buku Teks