Warda, M. (2004). How to register your own copyright (5th ed.). Sphinx Pub..
Chicago Style (17th ed.) CitationWarda, Mark. How to Register Your Own Copyright. 5th ed. Naperville, Ill.: Sphinx Pub., 2004.
MLA引文Warda, Mark. How to Register Your Own Copyright. 5th ed. Sphinx Pub., 2004.
警告：這些引文格式不一定是100％准確.