APA (7th ed.) Citation

Warmington, E. H. (1928). The commerce between the Roman empire and India. The University press.

Chicago Style (17th ed.) Citation

Warmington, E. H. The Commerce Between the Roman Empire and India. Cambridge [England]: The University press, 1928.

MLA (9th ed.) Citation

Warmington, E. H. The Commerce Between the Roman Empire and India. The University press, 1928.