edited by V.A.C. Gatrell, Bruce Lenman, and Geoffrey Parker
Europa Publications, 1980
Buku Referensi
edited by Vincenzo Ruggiero, Nigel South, Ian R. Taylor
Routledge , 1998.
Buku Teks
Freymond, Jacques, author
Frederick A. Preager, 1964
Buku Teks
Stavrianos, L.S.
Prentice-Hall, 1982
Buku Teks
Alenka Selih
Springer, 2012
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