Shunryu Suzuki, Mel Weitsman, Michael Wenger (1999). “Branching Streams Flow in the Darkness: Zen Talks on the Sandokai”, p.30, Univ of California Press
Pema Chodron (2007). “Always Maintain a Joyful Mind: And Other Lojong Teachings on Awakening Compassion and Fearlessness”, p.85, Shambhala Publications