Hamilton, Edith, author
W.W. Norton, 1942
Buku Teks
Koszarski, Richard, author
Macmillan Library Reference USA,, 1990
Buku Referensi
Cox, Homer T.
Twayne Publishers, 1967
Buku Teks
Hornblower, Simon, author
Routledge, Taylor & Francis Group, 2002
Buku Teks
Storey, Ian Christopher, 1946-, author
Wiley Balckwell, 2014
Buku Teks