APA Style

Barker, D, G., Gałajda, D. (2016). Positive Psychology Perspectives on Foreign Language Learning and Teaching (1). Switzerland: Springer Cham.

MLA Style

Barker, Danuta, Gabrys., Gałajda, Dagmara. "Positive Psychology Perspectives on Foreign Language Learning and Teaching". 1 Switzerland: Springer Cham, 2016. Text.