editors, Hans G. Schuetze, German Alvarez Mendiola
Sense, 2012
eBooks
Center for International Higher Education Boston Collage,
Majalah, Jurnal, Buletin
edited by William E. Butler
Sijthoff & Noordhoff, 1980
Buku Teks SO
Bernhard, Andrea
VS Research, 2012
eBooks
edited by Hans G. Schuetze and Maria Slowey
RoutledgeFalmer, 2000
Buku Teks