Drinka, Bridget, 1951-.
Cambridge University Press, 2017
Buku Teks SO
Larsen, Jen
HarperTeen, an imprint of HarperCollinsPublishers, 2015
Buku Teks
S.l. : s.n. 19-,
Buku Teks SO
Mangan, James T.
Prentice-Hall, 1963
Buku Teks SO
Aste, Tomaso
Taylor and Francis, 2008
Buku Teks SO