Jayasuriya, Shihan De Silva, author
Tauris Academic Studies, 2008
Buku Teks
Boren, Henry C., author
D.C. Heath and Company, 1977
Buku Referensi
Hayes, Carlton J. H., author
Macmillan, 1932
Buku Teks
Bloembergen, Marieke, author
Cambridge University Press, 2020
eBooks
Cambridge University Press, 1988
Buku Teks