Wyld, H.C.
Oxford Blackwell 1953
Buku Teks
Smith, Preserved
Cambridge University Press, 2014
eBooks
Weekley, Ernest
Dover Publications, 1967
Buku Referensi
Krasner, David, 1952-
Wiley Balckwell, 2016
Buku Teks
Toynbee, Arnold J.
Oxford University Press, 1955
Buku Teks