Cita APA (7a ed.)

(1979). Ethics and problems of the 21st century. University of Notre Dame Press.

Cita Chicago Style (17a ed.)

Ethics and Problems of the 21st Century. Notre Dame ; London: University of Notre Dame Press, 1979.

Cita MLA (9a ed.)

Ethics and Problems of the 21st Century. University of Notre Dame Press, 1979.