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I was just about to send a pdf to the printer when it struck me - how should a copyright line really be written, are there any rules?
I opened five books from respectable publishers (mainly US/UK) and found five alternatives (not to give undue credit/critique to anyone I've replaced the copyright holder with a random name):
Copyright © 2009 colaboy
copyright © colaboy, 2009
Copyright © 2009 by colaboy
Copyright © colaboy 2009
© colaboy 2009
I've also come across:
What usage do you makers/users of the symbol suggest?