Mitchell, Bruce, author
BlackWell, 1995
Buku Teks
Lambert, Thomas, author
Oxford University Press, 2017
eBooks
edited by Michael Lapidge, John Blair, Simon Keynes, and Donald Scrag
West Sussex Wiley-Blackwell, 2014
Buku Referensi
Phillip Pulsiano, Elaine Treharne, editor
Blackwell Publishing, 2008
Buku Teks
Sweet, H
Oxford Clarendon press 1950
Buku Teks