Webb, Keith
Molendinar Press, 1977
Buku Teks
Burnett, John
National Museums of Scotland, 1995
Buku Teks
Tait, Alan A.
Edinburgh University Press, 1980
Buku Teks
Foden, Giles, 1967- author
Vintage, 1999
Buku Teks
edited by Juliana D.M. Lew, Harris Bor, Gregory Fullelove, Joanne Greenaway
Kluwer Law International, 2013
Buku Teks