APA (7th ed.) Citation

Cullen, C. S., & Calcraft, J. (1830). A letter on the arbitrary license system. R. Heward.

Chicago Style (17th ed.) Citation

Cullen, C. Sinclair, and John Calcraft. A Letter on the Arbitrary License System. London: R. Heward, 1830.

MLA (9th ed.) Citation

Cullen, C. Sinclair, and John Calcraft. A Letter on the Arbitrary License System. R. Heward, 1830.