Veit, Richard, author
Pearson, 2001
Buku Teks
Lester, James D. Sr., 1935-2006, author
Pearson, 2015
Buku Teks
Lester, James D. Sr., 1935-2006, author
Pearson, 2015
Buku Teks
Margaret Anzul, author
Routledge, 2001
Buku Teks
Clymo, R. S, author.
Cambridge University Press, 2014.
Buku Teks