APA-Zitierstil (7. Ausg.)

Spencer, H. (1993). The Principles of Ethics: By Herbert Spencer. Williams and Norgate.

Chicago-Zitierstil (17. Ausg.)

Spencer, Herbert. The Principles of Ethics: By Herbert Spencer. London ; Edinburgh: Williams and Norgate, 1993.

MLA-Zitierstil (8. Ausg.)

Spencer, Herbert. The Principles of Ethics: By Herbert Spencer. Williams and Norgate, 1993.