Skjærvø, P. O. (2011). The spirit of Zoroastrianism. Yale University Press.
Cita Chicago (17th ed.)Skjærvø, Prods Oktor. The Spirit of Zoroastrianism. New Haven: Yale University Press, 2011.
Cita MLA (8th ed.)Skjærvø, Prods Oktor. The Spirit of Zoroastrianism. Yale University Press, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.