Mitchell, Bruce, author
Blackwell, 1995
Buku Teks
Zoetmulder, P. J. (Petrus Josephus), author
Martinus Nijhoff, 1982
Buku Referensi
Fulk, R. D. (Robert Dennis), author
Wiley-Blackwell, 2013
Buku Teks
edited by Malcolm Godden and Michael Lapidge
Cambridge University Press, 1991
Buku Teks
edited by Elaine Treharne
Wiley Blackwell, 2010
Buku Teks