APA (7th ed.) Citation

Duncan, D. (1908). The life and letters of Herbert Spencer. Methuen.

Chicago Style (17th ed.) Citation

Duncan, David. The Life and Letters of Herbert Spencer. London: Methuen, 1908.

MLA (9th ed.) Citation

Duncan, David. The Life and Letters of Herbert Spencer. Methuen, 1908.

Warning: These citations may not always be 100% accurate.