Pettersson, R. (2013). Predecessors & pioneers. Institute for Infology.
Dyfyniad Arddull ChicagoPettersson, Rune. Predecessors & Pioneers. Tullinge: Institute for Infology, 2013.
Dyfyniad MLAPettersson, Rune. Predecessors & Pioneers. Institute for Infology, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.