Seal, B. (1991). The Positive sciences of the Ancient. Motilal Banarsidass.
Chicago Style (17. basım) AtıfSeal, Brajendranath. The Positive Sciences of the Ancient. Delhi: Motilal Banarsidass, 1991.
MLA (9th ed.) AtıfSeal, Brajendranath. The Positive Sciences of the Ancient. Motilal Banarsidass, 1991.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..