APA (7th ed.) Citation

Gelo, O. C. G., Pritz, A., & Rieken, B. (2015). Psychotherapy research: Foundations, process, and outcome. Springer.

Chicago Style (17th ed.) Citation

Gelo, Omar C. G., Alfred Pritz, and Bernd Rieken. Psychotherapy Research: Foundations, Process, and Outcome. Vienna, [Austria]: Springer, 2015.

MLA (9th ed.) Citation

Gelo, Omar C. G., et al. Psychotherapy Research: Foundations, Process, and Outcome. Springer, 2015.