Ratnagar, S. (1981). Encounters: The westerly trade of the Harappa civilization. Oxford.
Cita Chicago (17th ed.)Ratnagar, Shereen. Encounters: The Westerly Trade of the Harappa Civilization. Delhi: Oxford, 1981.
Cita MLA (9th ed.)Ratnagar, Shereen. Encounters: The Westerly Trade of the Harappa Civilization. Oxford, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.