W.W. Norton & Company, 1977
Buku Teks
Samway, Katharine Davies
Maine : Stenhouse, 1996.,
Buku Teks
edited by Julia Athena Spinthourakis, John Lalor, Wolfgang Berg
VS Verlag, 2011
eBooks
Artikel Jurnal
Turville-Petre, Thorlac, author
Blackwell Publishing, 2007
Buku Teks