Toynbee, Arnold J., author
Oxford University Press, 1956
Buku Teks
Raffles, Thomas Stamford, author
Oxford University Press, 1982
Buku Referensi
Toynbee, Arnold J., author
Oxford University Press , 1948
Buku Referensi
Buku Teks
Gallagher, Matthew P., author
Frederick A. Preager, 1963
Buku Teks