Url to a NewForm with a specific content type

I have a SharePoint 2010 Site collection and I need to know how I would write the URLs to a newform.aspx associated with a SharePoint list when I have two separate content types.

Generally (for a single content type) I would do it like this:

http://ift.tt/1MHX4zB

..but this only displays the default content type.

I'm am sure there is a simple add-on to the URL to define the other content type but I simply don't know it and I cant find the answer in my resources so any assistance would be appreciated.

Thank in advance.