Lane, R. (1986). Roots of violence in Black Philadelphia, 1860 - 1900. Harvard Univ..
Dyfyniad Arddull ChicagoLane, Roger. Roots of Violence in Black Philadelphia, 1860 - 1900. Cambridge Massachussetts: Harvard Univ., 1986.
Dyfyniad MLALane, Roger. Roots of Violence in Black Philadelphia, 1860 - 1900. Harvard Univ., 1986.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.