APA

Hubble M. L., Miller S. D. & Duncan B. L. (1999). The heart and soul of change: what works in therapy. Washington, DC: American Psychological Association.

Chicago

Hubble Mark L, Miller Scott D and Duncan Barry L. 1999. The heart and soul of change: what works in therapy. Washington, DC: American Psychological Association.

Harvard

Hubble M. L., Miller S. D. and Duncan B. L. (1999). The heart and soul of change: what works in therapy. Washington, DC: American Psychological Association.

MLA

Hubble Mark L, Miller Scott D and Duncan Barry L. The heart and soul of change: what works in therapy. Washington, DC: American Psychological Association. 1999.