APA (7th ed.) Citation

Duncan, D., & Spencer, H. (2002). The life and letters of Herbert Spencer in two volumes: Volume I. University Press of the Pacific.

Chicago Style (17th ed.) Citation

Duncan, David, and Herbert Spencer. The Life and Letters of Herbert Spencer in Two Volumes: Volume I. Honolulu, Hawaii: University Press of the Pacific, 2002.

MLA (9th ed.) Citation

Duncan, David, and Herbert Spencer. The Life and Letters of Herbert Spencer in Two Volumes: Volume I. University Press of the Pacific, 2002.