Margaret Sanger, Michael W. Perry, H. G. Wells (2003). “The Pivot of Civilization in Historical Perspective: The Birth Control Classic”, p.369, Inkling Books
Charles Hodge (1855). “What is Presbyterianism?: An Address Delivered Before the Presbyterian Historical Society at Their Anniversary Meeting in Philadelphia, on Tuesday Evening, May 1, 1855”, p.16
Benjamin Whichcote (1753). “Moral and religious aphorisms collected from the manuscript papers of the reverend and learned Doctor Whichcote; and published in 1703, by Dr. Jeffery. Now re-published, with very large additions, ... by Samuel Salter, ... To which are added, Eight letter”, p.90
Alexander Hamilton, James Madison, John Jay (2015). “The Federalist Papers: A Collection of Essays Written in Favour of the New Constitution”, p.282, Coventry House Publishing
Alexander Hamilton, James Madison, John Jay (2015). “The Federalist Papers: A Collection of Essays Written in Favour of the New Constitution”, p.351, Coventry House Publishing
"Federalist No. 10. The Same Subject Continued: The Union as a Safeguard Against Domestic Faction and Insurrection" by James Madison, www.congress.gov. November 23, 1787.