
Citas por libros (orden cronológico), A Guide to Men: Being Encore Reflections of a Bachelor Girl (Una guía sobre los hombres: las reflexiones adicionales de una chica soltera), 1922
Fuente: Rawson, Hugh; Miner, Margaret. The Oxford Dictionary of American Quotations. Oxford University Press, 2006. ISBN 9780195168235. Página 576. https://books.google.es/books?id=whg05Z4Nwo0C&pg=PA576&dq=%C2%ABThe+follies+that+most+regret+in+the+life+of+a+man+are+those+that+were+not+committed+when+the+opportunity+was+taken&hl=es&sa=X&ved=0ahUKEwjylta51pXmAhX16OAKHY_HDogQ6AEIKTAA#v=onepage&q=%C2%ABThe%20follies%20that%20most%20regret%20in%20the%20life%20of%20a%20man%20are%20those%20that%20were%20not%20committed%20when%20the%20opportunity%20was%20taken&f=false En Google Libros. Consultado el 1 de diciembre de 2019.