Via the cryptography list, an object example in how to cite a wikipedia entry:
See the section on "Software whitening" in http://en.wikipedia.org/wiki/Hardware_random_number_generator (which was correct as of when I looked at it, a few minutes before the timestamp on this email; check the Wiki history to be sure....).
Udhay -- ((Udhay Shankar N)) ((udhay @ pobox.com)) ((www.digeratus.com))