Coulton, G.G. (George Gordon), author
Macmillan; University Press, 1938
Buku Teks
Marcucci, Luisa, author
Studio Books , 1960
Buku Referensi
Coldstream, Nicola
Oxford University Press, 2002
Buku Teks
edited by Eva. R. Hoffman
Blackwell, 2007
Buku Teks
Gyula Klima, Fritz Allhoff, Anand Vaidya
BlackWell Publishing, 2007
Buku Teks