Hassan Shukur. (1990). Retrospective study of surgical treatment of spondylolysis and spondylolisthesis in adults at the Kuala Lumpur General Hospital from June 1983 - December 1988: A short-term review. Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hassan Shukur. Retrospective Study of Surgical Treatment of Spondylolysis and Spondylolisthesis in Adults at the Kuala Lumpur General Hospital from June 1983 - December 1988: A Short-term Review. Kuala Lumpur: Universiti Kebangsaan Malaysia, 1990.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hassan Shukur. Retrospective Study of Surgical Treatment of Spondylolysis and Spondylolisthesis in Adults at the Kuala Lumpur General Hospital from June 1983 - December 1988: A Short-term Review. Universiti Kebangsaan Malaysia, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.