@book{Kruk:2019,
  author  = "M. Kruk",
  title     = "Assessing the Effectiveness of Virtual Technologies in Foreign and Second Language Instruction : Seria: Research Essentials Collection, ISBN: 9781522572862",
  publisher = "IGI Global Disseminator of Knowledge",
  address   = "-",
  pages     = "300",
  year      = "2019",
}