Cita APA (7a ed.)

Portman, M. E. (2009). Generalized Anxiety Disorder Across the Lifespan: An Integrative Approach. Springer New York. https://doi.org/10.1007/978-0-387-89243-6

Cita Chicago Style (17a ed.)

Portman, Michael E. Generalized Anxiety Disorder Across the Lifespan: An Integrative Approach. New York, NY: Springer New York, 2009. https://doi.org/10.1007/978-0-387-89243-6.

Cita MLA (9a ed.)

Portman, Michael E. Generalized Anxiety Disorder Across the Lifespan: An Integrative Approach. Springer New York, 2009. https://doi.org/10.1007/978-0-387-89243-6.