Gomperz, Theodor, author
John Murray, 1949
Buku Teks
Bagnall, Roger S.,
Routledge, 1995
Buku Teks
Hunter, Dard, 1883-1966, author
Dover Publications, Inc., 1978
Buku Teks
Scott, Ernest
Oxford University Press, 1953
Buku Teks
edited by Gordon Greenwood
Angus and Robertson, 1955
Buku Teks