Coates, Benjamin Allen, author
Oxford University Press, 2016
eBooks
Gray, Richard, 1944-, author
Longman, 1991
Buku Teks
Berkowitz, Gerald M., author
Longman, 1994
Buku Teks
Pearson, Frederic S., author
McGraw-Hill, 1992
Buku Teks
Bonner, Thomas Neville, author
Prentice-Hall, 1963
Buku Teks