, S., & , D. H. U. (2006). Factors influencing the use of instant messaging applications over the internet. [Yogyakarta] : Universitas Gadjah Mada.
Chicago Style Citation, SIDI, and Dr. Hargo Utomo. Factors Influencing the Use of Instant Messaging Applications Over the Internet. [Yogyakarta] : Universitas Gadjah Mada, 2006.
MLA引文, SIDI, and Dr. Hargo Utomo. Factors Influencing the Use of Instant Messaging Applications Over the Internet. [Yogyakarta] : Universitas Gadjah Mada, 2006.
警告：這些引文格式不一定是100％准確.