RewriteEngine on

RewriteCond %{HTTP_REFERER} !^http://baitulmaalmuamalat.btlmaal.org/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://baitulmaalmuamalat.btlmaal.org$      [NC]
RewriteCond %{HTTP_REFERER} !^http://btlmaal.org/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://btlmaal.org$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.baitulmaalmuamalat.btlmaal.org/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.baitulmaalmuamalat.btlmaal.org$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.btlmaal.org/.*$      [NC]
RewriteCond %{HTTP_REFERER} !^http://www.btlmaal.org$      [NC]
RewriteRule .*\.(jpg|jpeg|gif|png|bmp)$ - [F,NC]