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HTML Code:
<a href="http://www.breastfeedingsymbol.org/blog/"><img border="0" src="http://www.breastfeedingsymbol.org/pics/plainicon.gif" alt="The International Breastfeeding Symbol" width="50" height="50"></a>

PseudoHTML, UBBCode or BBCode (for bulletin boards and forum signatures):
[url=http://www.breastfeedingsymbol.org/blog/][img]http://www.breastfeedingsymbol.org/pics/plainicon.gif[/img][/url]

Ezcode:
[link=http://www.breastfeedingsymbol.org/blog/][img noborder]http://www.breastfeedingsymbol.org/pics/plainicon.gif[/img][/link]