Fraser, Barry J.
Springer, 2012
eBooks
Leiden : E.J. Brill
Majalah, Jurnal, Buletin
edited by Ulrich Ammon, Norbert Dittmar, Klaus J. Mattheier
Walter de Gruyter, 1987
Buku Referensi
Mackerras, Colin, author
Cambridge University Press, 1991
Buku Teks
Robert W. Hefner, editor
Routledge, Taylor & Francis Group, 2018
Buku Teks