Melville, Arbaella, author
Willliam Collins & Sons, 1987
Buku Referensi
Papich, Mark G., author
Elsevier, 2016
Buku Teks
Deleu, Josef, chief editor
Flemish-Netherlands Foundation, 1994
Buku Referensi
Keltner, Norman L., author
Mosby , 2001
Buku Teks
David R. Mottram, editor
Routledge, 2011
Buku Teks