@book{WolfPolzenhagen2009,
  author    = {Hans-Georg Wolf and Frank Polzenhagen},
  title     = {World Englishes : a cognitive sociolinguistic approach},
  volume    = {8},
  isbn      = {978-3-11-019633-7},
  doi       = {10.1515/9783110199222},
  year      = {2009},
}