Gingeras, Ryan, author
Oxford University Press, 2016
eBooks
Logevall, Fredrik, 1963-, author
Random House Trade Paperbacks, 2012
Buku Teks
Todorova, Elissaveta
Sofia press, 1987
Buku Teks
Somel, Selcuk Aksin, author
Scarecrow Press, 2012
Buku Teks
edited by Gabor Agoston, Bruce Masters
Facts On File, 2009
Buku Referensi