Παραπομπή σε μορφή APA (7η εκδ.)

Sperry,Len, & Sperry,Jon. (2023). Core Clinical Competencies in Counseling and Psychotherapy: Becoming a Highly Competent and Effective Therapist (2nd.). Routledge.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sperry,Len, και Sperry,Jon. Core Clinical Competencies in Counseling and Psychotherapy: Becoming a Highly Competent and Effective Therapist. 2nd. New York & London: Routledge, 2023.

Παραπομπή σε μορφή MLA (9th εκδ.)

Sperry,Len, και Sperry,Jon. Core Clinical Competencies in Counseling and Psychotherapy: Becoming a Highly Competent and Effective Therapist. 2nd. Routledge, 2023.