2. Allen M. Chen: New Notes on the New Translation of Tao Te Ching, new york: 1989 Edition.
3. Tao and Its Power, London: 1934; New york: reproduced in 1958.
4.Paul J.Lin: Lao Zi translated Tao Te Ching and Wang Bi's Notes, Ann Arbor: 1977 edition.
5. Legge: Taoist Classics: Tao Te Ching, Oxford: 189 1 Edition; New york: reprinted in1959; Delhi: 1966 "Oriental Holy Book" series edition.
6. Liu Dechang (D. C. Lau): China Classic: Tao Te Ching, First Edition1963; Hong Kong: 1982 version. (Press: 1963 published in Britain. )
7.Wing tsit Chan: The Way of Laozi, Neapolitan and new york: 1963 Edition.