Positive Psychology Perspectives on Foreign Language Learning and Teaching
  MLA
  Gabryś-Barker, Danuta; Gałajda, Dagmara, and Dagmara Gałajda. Positive Psychology Perspectives On Foreign Language Learning and Teaching. Springer International Publishing, 2016.
  APA
  Gabryś-Barker, D., & Gałajda, D. (2016). Positive Psychology Perspectives on Foreign Language Learning and Teaching. Springer International Publishing.
  Chicago
  Gabryś-Barker, Danuta; Gałajda, Dagmara, and Dagmara Gałajda. Positive Psychology Perspectives On Foreign Language Learning and Teaching. : Springer International Publishing, 2016.