edited by P.M.S. Hacker and J. Raz
Clarendon Press, 1988
Buku Teks
Cowen, Zelman, author
Butteworths, 1983
Buku Teks
edited by Martin H. Greenberg
Grafton, 1991
Buku Teks
edited by S.A. Wurm and D.C. Laycock
Linguistic Circle of Canberra, 1970
Buku Klasik
edited by Willy Sellekaerts
Macmillan, 1974
Buku Teks