Manuscript attributed to Lǎozǐ that is the foundational text of philosophical and religious Daoism

Books

Te-Tao Ching (Modern Library)
    by Lǎozǐ, 1993
Translated and with and introduction by Robert G. Henricks; partial contents: The Ma-wang-tui Manuscripts of the Lao-tzu and Other Versions of the Text - The Philosophy of Lao-tzu - Translator's Note - Te (Virtue) - Tao (The Way)