APA (7th ed.) Zitazioa

Kennedy, J. G. (1978). Herbert Spencer. Twayne.

Chicago Style (17th ed.) Zitazioa

Kennedy, James Gettier. Herbert Spencer. Boston: Twayne, 1978.

MLA (9th ed.) Zitazioa

Kennedy, James Gettier. Herbert Spencer. Twayne, 1978.