Del Villar, C. P. (2007). Communication apprehension: Survey of studies, treatments, and techniques. Philippine Humanities Review:Rebyu ng Arte at Literatura ng Pilipinas.
Chicago-referens (17:e uppl.)Del Villar, Carmencita P. "Communication Apprehension: Survey of Studies, Treatments, and Techniques." Philippine Humanities Review:Rebyu Ng Arte at Literatura Ng Pilipinas 2007.
MLA-referens (9:e uppl.)Del Villar, Carmencita P. "Communication Apprehension: Survey of Studies, Treatments, and Techniques." Philippine Humanities Review:Rebyu Ng Arte at Literatura Ng Pilipinas, 2007.
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