Ahmad Kamal Hayati Yahya. (1999). Ultrasonic attenuation and sound velocity studies and oxygen-related anomalies in copper oxide-based superconductors and perovskite-like materials. Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ahmad Kamal Hayati Yahya. Ultrasonic Attenuation and Sound Velocity Studies and Oxygen-related Anomalies in Copper Oxide-based Superconductors and Perovskite-like Materials. Bangi: Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 1999.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ahmad Kamal Hayati Yahya. Ultrasonic Attenuation and Sound Velocity Studies and Oxygen-related Anomalies in Copper Oxide-based Superconductors and Perovskite-like Materials. Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 1999.