APA (7th ed.) Citation

Lucretius & Latham, R. E. (1971). On the nature of the universe. Penguin Books.

Chicago Style (17th ed.) Citation

Lucretius and R. E. Latham. On the Nature of the Universe. Harmondsworth: Penguin Books, 1971.

MLA (9th ed.) Citation

Lucretius and R. E. Latham. On the Nature of the Universe. Penguin Books, 1971.