Eco, Umberto, author
Fontana, 1997
Buku Teks SO
Larsen, Jen, author
HarperTeen, an imprint of HarperCollinsPublishers, 2015
Buku Teks
S.l. : s.n. 19-,
Buku Teks
Mangan, James T., author
Prentice-Hall, 1963
Buku Teks
Aste, Tomaso, author
Taylor and Francis, 2008
Buku Teks