Pope Benedict XVI (2008). “Pope Benedict in America: The Full Texts of Papal Talks Given During His Apostolic Visit to the United States”, p.130, Ignatius Press
Johann Wolfgang von Goethe (2017). “The Sorrows of Young Werther (English German Edition, illustrated): Die Leiden des jungen Werther (Englisch Deutsch Ausgabe illustriert)”, p.51, Clap Publishing, LLC.