APA (7th ed.) Citation

Cicero, M. T., Sabine, G. H., & Smith, S. B. (1929). On the Commonwealth. Bobbs-Merrill.

Chicago Style (17th ed.) Citation

Cicero, Marcus Tullius, George Holland Sabine, and Stanley Barney Smith. On the Commonwealth. Indianapolis: Bobbs-Merrill, 1929.

MLA (9th ed.) Citation

Cicero, Marcus Tullius, et al. On the Commonwealth. Bobbs-Merrill, 1929.