APA-viite (7. p.)

Hudson, W. H. (1894). An introduction to the philosophy of Herbert Spencer: With a biographical sketch. D. Appleton and co..

Chicago-viite (17. p.)

Hudson, William Henry. An Introduction to the Philosophy of Herbert Spencer: With a Biographical Sketch. New York: D. Appleton and co., 1894.

MLA-viite (8. p.)

Hudson, William Henry. An Introduction to the Philosophy of Herbert Spencer: With a Biographical Sketch. D. Appleton and co., 1894.