"'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.
Edward Everett Hale, Hsuan L. Hsu, Susan Kalter (2010). “Two Texts by Edward Everett Hale: "The Man Without a Country" and Philip Nolan's Friends”, p.32, Rowman & Littlefield