Guevara, G. A. (2007). The heart of philosophy: The philosophy of the heart new directions in philosophy in response to new trends in social affairs. Ad Veritatem.
Chicago-viite (17. p.)Guevara, Geoffrey A. "The Heart of Philosophy: The Philosophy of the Heart New Directions in Philosophy in Response to New Trends in Social Affairs." Ad Veritatem 2007.
MLA-viite (9. p.)Guevara, Geoffrey A. "The Heart of Philosophy: The Philosophy of the Heart New Directions in Philosophy in Response to New Trends in Social Affairs." Ad Veritatem, 2007.
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