edited by Robert F. Ilson
Philadephia John Benjamin Publishing, 1987
Buku Teks
Hartmann, Reinhard R.K., author
Routledge, 1998
Buku Referensi
Hartmann, Reinhard R.K., author
Routledge , 1998
Buku Referensi
Hartmann, Reinhard R.K., author
Pearson Education, 2001
Buku Teks
Allan F. Lauder, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2010
Artikel Jurnal