Gillispie, Charles Coulston, author
Princeton University Press, 1980
Buku Teks
Horgan, John, author
Teraju, 2005
Buku Teks
Aldred, Cyril
Thames and Hudson, 1965
Buku Teks
Scott, J. D.
Eyre and Spottiswoode, 1954
Buku Teks
Schubert, Glendon, author
Boston University Press, 1970
Buku Teks