Citazione APA

Barker, M., Langdridge, D., & Vossler, A. (2010). Understanding counselling and psychotherapy. SAGE ; In association with The Open University.

Stile di citazione Chicago

Barker, Meg, Darren Langdridge, e Andreas Vossler. Understanding Counselling and Psychotherapy. London ; Thousand Oaks, Calif. : Milton Keynes [England]: SAGE ; In association with The Open University, 2010.

Citazione MLA

Barker, Meg, et al. Understanding Counselling and Psychotherapy. SAGE ; In association with The Open University, 2010.