Williams, Harold Herbert, author
Sidgwick & Jackson, 1918
Buku Teks
edited by Peter Hunt
Oxford University Press , 1995
Buku Teks
edited by John Morán González
Cambridge University Press, 2016
Buku Teks
Ward, A.C.
The English Language Book, 1928
Buku Teks
edited by Peter Brooker and Andrew Thacker
Routledge, 2005
Buku Teks