Cita APA (7a ed.)

Piedra, A. M. (2004). Natural law: The foundation of an orderly economic system. Lexington Books.

Cita Chicago Style (17a ed.)

Piedra, Alberto M. Natural Law: The Foundation of an Orderly Economic System. Lanham, Md.: Lexington Books, 2004.

Cita MLA (9a ed.)

Piedra, Alberto M. Natural Law: The Foundation of an Orderly Economic System. Lexington Books, 2004.