The theory is Cognitive Therapy but it need to focus on PTSD under the theory. The instructions are below.

Each student will submit a paper in which she or he applies a major theory of counseling to a client presenting problem that is of particular interest to the student. You must follow APA style as delineated by the most recent APA Publication Manual (7th ed.). The paper will contain four sections (each section should be a minimum of 1.5 pages in length): 1) Review of the Theoretical Orientation (including integration of at least 4 references from scholarly journals or book chapters); 2) Self-Analysis (including at minimum your view of counseling, why people enter counseling, how people change, and why the theory you selected appeals to you) 3) brief Review of a Presenting Problem (e.g., etiology, common symptoms) (include at least 2 references from scholarly journals or book chapters); and 4) Application of the Theory to the Problem (including technical aspects of service delivery). In total, a minimum of 6 appropriate (see below) references must be utilized for this paper. Please note: Theoretical orientation typically refers to a broad counseling approach and way of understanding and viewing people, behavior, and change, versus a narrower counseling technique. Theoretical orientations typically involve various techniques..
Additionally, you will need to submit your journal article references electronically (either in PDF format or Microsoft Word) The paper should adhere to APA Style as delineated by the 7th edition APA Publication Manual, meet page requirements described above, be typed, double-spaced, and include the required number of references each from scholarly journals and book chapters (scholarly journals and book chapters do not include things like Wikipedia, Encyclopedia of Psychology, Monitor on Psychology, Psychology Today, Readers Digest, ESPN Magazine, Oprahs magazine, The Globe, Hattiesburg American, etc.).