Cullen, Pauline, author
Cambridge university press, 2010
Buku Teks
Bauer, Lauria
London : Routledge, 1998
Buku Teks
Morgan, John, 1944-2004, author
Oxford University Press, 1990
Buku Teks
Athala Rafi Pratama, author
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2023
UI - Tugas Akhir
Langan, John, 1942-, author
McGraw-Hill, 1992
Buku Teks