Budin, S., Zaharudin, A. M., & Priyanto, S. (2009). Modeling of impact energy generated by free falling ball / Salina Budin, Aznifa Mahyam Zaharudin and Sugeng Priyanto. Universiti Teknologi MARA, Pulau Pinang & Pusat Penerbitan Universiti (UPENA).
Chicago-viite (17. p.)Budin, Salina, Aznifa Mahyam Zaharudin, ja Sugeng Priyanto. Modeling of Impact Energy Generated by Free Falling Ball / Salina Budin, Aznifa Mahyam Zaharudin and Sugeng Priyanto. Universiti Teknologi MARA, Pulau Pinang & Pusat Penerbitan Universiti (UPENA), 2009.
MLA-viite (9. p.)Budin, Salina, et al. Modeling of Impact Energy Generated by Free Falling Ball / Salina Budin, Aznifa Mahyam Zaharudin and Sugeng Priyanto. Universiti Teknologi MARA, Pulau Pinang & Pusat Penerbitan Universiti (UPENA), 2009.