*[https://www.christianity.com/wiki/christian-terms/what-is-holiness-what-can-be-holy.html What Is Holiness? How Can We Be Holy?], Christianity.com
*[https://www.biblestudytools.com/dictionary/holiness/ Holiness], Biblestudytools.com
*[https://www.christianpost.com/news/max-lucado-7-things-god-says-are-holy-whats-sacred-to-us.html 7 Things God Says Are Holy; What's Sacred to Us?], Christian Post, 2016
Videos: