Cita APA (7a ed.)

Darwin, C. R., Darwin, F., & Seward, A. C. (1903). More letters of Charles Darwin: A record of his work in a series of hitherto unpublished letters. John Murray.

Cita Chicago Style (17a ed.)

Darwin, Charles Robert, Francis Darwin, y A. C. Seward. More Letters of Charles Darwin: A Record of His Work in a Series of Hitherto Unpublished Letters. London: John Murray, 1903.

Cita MLA (9a ed.)

Darwin, Charles Robert, et al. More Letters of Charles Darwin: A Record of His Work in a Series of Hitherto Unpublished Letters. John Murray, 1903.