Krenz-Kurowska, J., & Kurowski, J. (2013). RESS essentials. Packt Publishing.
Dyfyniad Arddull ChicagoKrenz-Kurowska, Joanna, and Jerzy Kurowski. RESS Essentials. Birmingham: Packt Publishing, 2013.
Dyfyniad MLAKrenz-Kurowska, Joanna, and Jerzy Kurowski. RESS Essentials. Packt Publishing, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.