Cita APA (7th ed.)
Thoreau, H. D. (2001). Life without principle. Virginia Tech.
Cita Chicago (17th ed.)
Thoreau, Henry David. Life Without Principle. Blacksburg, VA: Virginia Tech, 2001.
Cita MLA (9th ed.)
Thoreau, Henry David. Life Without Principle. Virginia Tech, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.