Nhất Hạnh (Thích.), Thich Nhat Hanh (1998). “The Heart of the Buddha's Teaching: Transforming Suffering Into Peace, Joy, & Liberation : the Four Noble Truths, the Noble Eightfold Path, & Other Basic Buddhist Teachings”
Oscar Wilde (1956). “Annotated The Importance of Being Earnest: A Trivial Comedy for Serious People with English Grammar Exercises: by Oscar Wilde (Author), Robert Powell (Editor)”, p.72, Powell Publications, LLC