The Encyclopedia of the Modern World: 1900 to the Present
William R. Keylor
Apologetics Study Bible
Ted Cabal
John Locke
W. M. Spellman
Self and Others
Ronald David Laing
Key Concepts in Politics and International Relations
Andrew Heywood
Studies in Philosophy, Politics and Economics
Friedrich August Hayek
Success and Understanding
Jean Piaget
Freud and Jung, Conflicts of Interpretation
Robert S. Steele & Susan Virginia Swinney