Barnett, Mary, author
Grange Books, 1997
Buku Referensi
Moncrieff, A.R. Hope, author
Gramercy Books, 1995
Buku Referensi
Casson, Lionel, author
Time-Life Books, 1965
Buku Teks
edited by Kathryn A. Bard ; editing assistance of Steven Blake Shubert
Routledge, 1999
Buku Referensi
Bard, Kathryn A., author
Blackwell Publishing, 2008
Buku Teks