APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Warmington, E. H. The Commerce Between the Roman Empire and India. Cambridge: University Press, 1928.

MLA (8th ed.) Citation

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