Cita APA (7a ed.)

Olafson, F. A. (1967). Principles and persons: An ethical interpretation of existentialism. Johns Hopkins Press.

Cita Chicago Style (17a ed.)

Olafson, Frederick A. Principles and Persons: An Ethical Interpretation of Existentialism. Baltimore: Johns Hopkins Press, 1967.

Cita MLA (9a ed.)

Olafson, Frederick A. Principles and Persons: An Ethical Interpretation of Existentialism. Johns Hopkins Press, 1967.