Alternatively, if “Rebecca A. Gilliland” is a professor or class resource, check your course syllabus — the correct citation may be a chapter within another book (e.g., Public Relations Cases by Hendrix or Wilcox).
However, based on standard academic and professional publishing records, under Rebecca A. Gilliland. It is possible you are referencing a course packet, a chapter in a larger PR text, a student’s thesis, or a misremembered title/author. Alternatively, if “Rebecca A