Yearley, Lee H. Mencius and Aquinas: Theories of Virtue and Conceptions of Courage. Albany, N.Y.: State University of New York Press, 1990.
Yeats, William Butler. The Collected Poems of W. B. Yeats. New York: Macmillan, 1958.
Yelaja, Shankar A., editor. Authority and Social Work: Concept and Use. Toronto: University of Toronto Press, 1971.
Yonker, Nicholas J. God, Man and the Planetary Age: Preface for a Theistic Humanism. Corvalis: Oregon State University Press, 1978.
Young-Bruehl, Elisabeth. Hannah Arendt: for Love of the World. New Haven: Yale University Press, 1982.
Yourgrau, Wolfgang and Stanley Mandelstam. Variational Principles in Dynamics and Quantum Theory. London: Sir Isaac Pitman and Sons, 1955.