Citação norma APA

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

Citação norma Chicago

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

Citação norma MLA

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

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.