Ernie Tisnawati Sule, author
Permata Aksara, 2010
Buku Teks
edited by Ian R. Swingland and Paul J. Greenwood
Clarendon Press, 1983
Buku Teks
Singer, Peter, author
2009
Buku Teks
Allee, W.C., author
John Wiley & Sons, 1963
Buku Teks
Chandler, Cynthia K., author
Routledge, 2012
Buku Teks