Frankfurt Harry. (2005). On Bullshit. Princeton University Press.
Dyfyniad Arddull ChicagoFrankfurt Harry. On Bullshit. Mumbai: Princeton University Press, 2005.
Dyfyniad MLAFrankfurt Harry. On Bullshit. Princeton University Press, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.