Stubbs, Michael, author
Blackwell , 2001
Buku Teks
Goddard, Cliff, author
Oxford University Press, 2014
Buku Teks
Gruber, Jeffrey S.
North-Holland , 1976
Buku Teks
Cambridge University Press, 2004
eBooks
Lewis, C. S.
Cambridge University Press, 1994
Buku Teks