Dwyer, Susan
Wodsworth Publishing Company, 1995
Buku Teks
Easton, Susan M., author
Routledge, [date of publication not identified]
Buku Teks
Rubinoff, Lionel, author
Ballantine Books, 1969
Buku Teks
edited by Catherine Itzin
Oxford University Press, 1992
Buku Teks
Akbar Nugroho Putro, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Makalah dan Kertas Kerja