Thich Nhat Hanh (2008). “Be Free Where You Are: A Talk Given at the Maryland Correctional Institute: Easyread Super Large 20pt Edition”, p.24, ReadHowYouWant.com
Thich Nhat Hanh (2011). “Your True Home: The Everyday Wisdom of Thich Nhat Hanh: 365 days of practical, powerful teaching s from the beloved Zen teacher”, p.3, Shambhala Publications