Cita APA (7th ed.)
Olafson, F. A. (1967). Principles and Persons: An Ethical Interpretation of Existentialism. Johns Hopkins Press.
Cita Chicago (17th ed.)
Olafson, Frederick A. Principles and Persons: An Ethical Interpretation of Existentialism. Baltimore: Johns Hopkins Press, 1967.
Cita MLA (9th ed.)
Olafson, Frederick A. Principles and Persons: An Ethical Interpretation of Existentialism. Johns Hopkins Press, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.