edited by Joseph S. Roucek
Philosophical Library, 1949
Buku Referensi
edited by Bernard Comrie and Greville G. Corbett
Routledge, 1993
Buku Teks
Bray, R.G.A. de, author
J.M. Dent & Sons, 1951
Buku Teks
edited by David Macdonald
Facts on File, 1993
Buku Referensi
edited by P.V. Vidyasagar
Mittal Publications, 2000
Buku Referensi