APA (7th ed.) Citation

Hume, D., Klibansky, R., & Mossner, E. C. (1954). New letters of David Hume. Clarendon.

Chicago Style (17th ed.) Citation

Hume, David, Raymond Klibansky, and Ernest Campbell Mossner. New Letters of David Hume. Oxford: Clarendon, 1954.

MLA (9th ed.) Citation

Hume, David, et al. New Letters of David Hume. Clarendon, 1954.