Del Villar, C. P. (2007). Communication apprehension: Survey of studies, treatments, and techniques. Philippine Humanities Review:Rebyu ng Arte at Literatura ng Pilipinas.
Chicago-viite (17. p.)Del Villar, Carmencita P. "Communication Apprehension: Survey of Studies, Treatments, and Techniques." Philippine Humanities Review:Rebyu Ng Arte at Literatura Ng Pilipinas 2007.
MLA-viite (9. p.)Del Villar, Carmencita P. "Communication Apprehension: Survey of Studies, Treatments, and Techniques." Philippine Humanities Review:Rebyu Ng Arte at Literatura Ng Pilipinas, 2007.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.