Fischer, Hermann
Cambridge University Press, 1991
eBooks
Stafford, Fiona
Wiley Blackwell, 2012
Buku Teks SO
edited by Valentine Cunningham
West Sussex Wiley Blackwell, 2014
Buku Teks SO
Houghton, Walter E.
Houghton Mifflin, 1959
Buku Teks SO
Wordsworth, William
Houghton Mifflin, 1910
Buku Teks SO