Thomas Jefferson, Henry Augustine Washington (1854). “The Writings of Thomas Jefferson: Miscellaneous: 4. Parliamentary manual; 5. The anas; 6. Miscellaneous papers”, p.493
"'I envisioned my child pushing through a very heavy door… so I couldn't think about my own pain': Beyoncé opens up about giving birth and her plans for baby No.2" by Fehintola Betiku, www.dailymail.co.uk. February 11, 2013.