* [[w:Blue_law|Wikipedia: Blue Laws]] * [https://www.amazon.com/American-papers-bearing-Sunday-legislation-ebook/dp/B00RR63GFG?language=en_US American Papers Bearing on Sunday Legislation] * [https://www.amazon.com/Civil-Government-Religion-Christianity-Constitution/dp/111351518X Civil Government and Religion: Or Christianity and the American Constitution] * [http://libertymagazine.org/article/once-upon-a-time-a-tale-of-the-1800s Robert H. Crockett's speech] <noinclude>