Seal, B. (1991). The Positive sciences of the Ancient. Motilal Banarsidass.
Cita Chicago (17th ed.)Seal, Brajendranath. The Positive Sciences of the Ancient. Delhi: Motilal Banarsidass, 1991.
Cita MLA (9th ed.)Seal, Brajendranath. The Positive Sciences of the Ancient. Motilal Banarsidass, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.