Richtel, M. Don't want to talk about it? New service sells missed calls. The Philippine star.
Chicago-viite (17. p.)Richtel, Matt. "Don't Want to Talk About It? New Service Sells Missed Calls." The Philippine Star .
MLA-viite (9. p.)Richtel, Matt. "Don't Want to Talk About It? New Service Sells Missed Calls." The Philippine Star, .
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