[1]
R. Colledge, Mastering counselling theory, vol. Palgrave master series. New York: Palgrave, 2002. Available: https://ebookcentral.proquest.com/lib/bilibrary/detail.action?pq-origsite=primo&docID=6418945
[2]
R. Nelson-Jones, Basic counselling skills, 4th edition. Thousand Oaks, CA: SAGE Publications, 2015.