Von Hallberg, R. (2008). Lyric powers. University of Chicago Press.
Dyfyniad Arddull ChicagoVon Hallberg, Robert. Lyric Powers. Chicago: University of Chicago Press, 2008.
Dyfyniad MLAVon Hallberg, Robert. Lyric Powers. University of Chicago Press, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.