APA (7th ed.) Citation

Tomber, R., Simpson, A., & Copeland, P. (2008). Indo-Roman trade: From pots to pepper. Duckworth.

Chicago Style (17th ed.) Citation

Tomber, R., Antony Simpson, and Penny Copeland. Indo-Roman Trade: From Pots to Pepper. London: Duckworth, 2008.

MLA (9th ed.) Citation

Tomber, R., et al. Indo-Roman Trade: From Pots to Pepper. Duckworth, 2008.