@Manual{          collins:polish,
  Author        = "Forss, Hania",
  date-added    = "2018-12-21 17:59:05 +0100",
  date-modified = "2018-12-21 17:59:48 +0100",
  Keywords      = "Polish language",
  Title         = "Collins Easy Learning Polish Audio Course",
  File          = "Collins Easy Learning Polish Audio Course - a - a - g"
}

@Manual{ collins:polish, Author = "Forss, Hania", date-added = "2018-12-21 17:59:05 +0100", date-modified = "2018-12-21 17:59:48 +0100", Keywords = "Polish language", Title = "Collins Easy Learning Polish Audio Course", File = "Collins Easy Learning Polish Audio Course - a - a - g" }