APA Formatting and Style Guide – The OWL at Purdue The Purdue University Online Writing Lab (OWL) is a great writing resource. Included in their site is an APA Formatting and Style Guide that is very useful. Check it out. Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Pocket (Opens in new window)Click to email this to a friend (Opens in new window)Click to print (Opens in new window)Like this:Like Loading...