APA (7th ed.) Citation

Mackay, T., & Spencer, H. (1891). A plea for liberty ([Authorized ed.].). D. Appleton.

Chicago Style (17th ed.) Citation

Mackay, Thomas, and Herbert Spencer. A Plea for Liberty. [Authorized ed.]. New York: D. Appleton, 1891.

MLA (8th ed.) Citation

Mackay, Thomas, and Herbert Spencer. A Plea for Liberty. [Authorized ed.]. D. Appleton, 1891.