APA (7th ed.) Citation

Seneca, L. A., & Campbell, R. (1969). Letters from a Stoic: Epistulae morales ad Lucilium. Penguin.

Chicago Style (17th ed.) Citation

Seneca, Lucius Annaeus, and Robin Campbell. Letters from a Stoic: Epistulae Morales Ad Lucilium. Harmondsworth: Penguin, 1969.

MLA (8th ed.) Citation

Seneca, Lucius Annaeus, and Robin Campbell. Letters from a Stoic: Epistulae Morales Ad Lucilium. Penguin, 1969.