APA-viite

O Brien & Houston. (2007). Integrative Therapy: A practitioners guide (2nd.ed.).

Chicago-tyylinen lähdeviittaus

O Brien ja Houston. Integrative Therapy: A Practitioners Guide. 2nd.ed. London, 2007.

MLA-viite

O Brien ja Houston. Integrative Therapy: A Practitioners Guide. 2nd.ed. 2007.