Ibbotson, Mark, author
Cambridge university press, 2010
Buku Teks
Othman bin Sulaiman
Pelanduk Publications, 1980
Buku Teks
Thornburn, Scott, 1950-, author
Cambridge University Press, 2017
Buku Teks
Pollock, Carroll Washington
Prentice-Hall, 1982
Buku Teks
Kelly, Curtis, author
Cambridge university press, 2008
Buku Teks