Rose, Gillian, author
Sage Publications, 2005
Buku Teks
Corbeil, Jean Claude, author
QA Internasional, 2004
Buku Referensi
SSi Press, Tt
Buku Referensi
Universitas Indonesia, 2010
UI - Skripsi (Open)
Floch, Jean-Marie, author
Originally Published, 2000
Buku Teks