Warrack, John, author
Oxford University Press, 1996
Buku Referensi
editor, Angela Partington
Oxford University Press, 1992
Buku Referensi
Wheeler, Marcus, author
Glarendon Press, 1984
Buku Referensi
Warrack, John, author
Oxford University Press, 1992
Buku Referensi
Kennedy, Michael, author
Oxford University Press, 1996
Buku Referensi