Hisham bin Abdul Rahman. (1998). The manometric study of upper esophageal sphincter in relation to voice production amongst postlaryngectomy patients in UKM. Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hisham bin Abdul Rahman. The Manometric Study of Upper Esophageal Sphincter in Relation to Voice Production Amongst Postlaryngectomy Patients in UKM. Kuala Lumpur: Universiti Kebangsaan Malaysia, 1998.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hisham bin Abdul Rahman. The Manometric Study of Upper Esophageal Sphincter in Relation to Voice Production Amongst Postlaryngectomy Patients in UKM. Universiti Kebangsaan Malaysia, 1998.
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