edited by William D. Simonson, D.A. Coomes, David F.R.P. Burslem
Cambridge University Press, 2014
Buku Teks
David Lawrence Peterson, James M Vose, Toral Patel-Weynand, editors
Springer, 2014
Buku Teks
Harvey, L.D. Danny, author
Prentice-Hall, 2000
Buku Teks
Whitmore, T.C., author
Clarendon Press, 1990
Buku Teks
oleh Adirini Pujayanti [and others]; penyunting, Poltak Partogi Nainggolan
P3DI Setjen DPR RI, 2010
Buku Teks