Manila : The University Research Coordination, 2006,
Majalah, Jurnal, Buletin
Jakarta : FK-UI, 2005,
Majalah, Jurnal, Buletin
Holloway, Immy
Blackwell, 1997
Buku Teks
Manila : De La Saller University, 2007,
Majalah, Jurnal, Buletin
Wengraf, Tom
Sage Publications, 2002
Buku Teks