Cita APA (7a ed.)

(1902). Discourses: Biological & Geological. Essays. Macmillan and Co..

Cita Chicago Style (17a ed.)

Discourses: Biological & Geological. Essays. London: Macmillan and Co., 1902.

Cita MLA (9a ed.)

Discourses: Biological & Geological. Essays. Macmillan and Co., 1902.