APA-viite (7. p.)
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
Chicago-viite (17. p.)
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.
MLA-viite (9. p.)
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.
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