Berger John
Penguin Books, 1977
Buku Teks
Eddie Karsito, author
Ufuk Press, 2008
Buku Referensi
Ward, Ossian, author
Laurence King Publishing Ltd, 2014
Buku Teks
Gracias, Fatima da Silva, author
Fundacao Oriente, 2014
Buku Teks
Forcellino, Antonio, author
Polity Press, 2012
Buku Teks