APA (7th ed.) Citation

Huxley, L., & Huxley, T. H. (1900). Life and letters of Thomas Henry Huxley. Macmillan and Co.

Chicago Style (17th ed.) Citation

Huxley, Leonard, and Thomas Henry Huxley. Life and Letters of Thomas Henry Huxley. London: Macmillan and Co, 1900.

MLA (9th ed.) Citation

Huxley, Leonard, and Thomas Henry Huxley. Life and Letters of Thomas Henry Huxley. Macmillan and Co, 1900.