You can google it or simply do this:
1. Right Click on your web browser (I use Chrome), click view page source
1. Right Click on your web browser (I use Chrome), click view page source
2. CTRL + F in the page source, find rss
3. You'll see lines something like this:
That's the RSS feed url you've been looking for 
Source
Where Do I Find the RSS Feed URL? :: AWeber Knowledge Base