(Becoming Vegan, 2013): "There are degrees of veganism. A pure vegetarian or dietary vegan is someone who consumes a vegan diet but doesn't lead a vegan lifestyle
Horgan, "Eric Roberts’ Multiple Media Roles" (页面存档备份,存于互联网档案馆), FishbowlLA, 10 February 2011. "Robertson goes vegan ahead of UK Championship defence" (页面存档备份,存于互联网档案馆)