APA (7th ed.) Citation

Romilly, S. H., Romilly, A. G., Edgeworth, M., Romilly, S., & Edgeworth, R. L. (1936). Romilly-Edgeworth letters, 1813-1818. Murray.

Chicago Style (17th ed.) Citation

Romilly, Samuel Henry, Anne Garbett Romilly, Maria Edgeworth, Samuel Romilly, and Richard Lovell Edgeworth. Romilly-Edgeworth Letters, 1813-1818. London: Murray, 1936.

MLA (9th ed.) Citation

Romilly, Samuel Henry, et al. Romilly-Edgeworth Letters, 1813-1818. Murray, 1936.