Luhmann, N. (1998). Observations on modernity. Stanford University Press.
Dyfyniad Arddull ChicagoLuhmann, Niklas. Observations on Modernity. Stanford, Calif: Stanford University Press, 1998.
Dyfyniad MLALuhmann, Niklas. Observations on Modernity. Stanford University Press, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.