Gumbang, R. H. (2001). Perception of special education needs teachers towards in-service training programmes for special education in Sarawak.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Gumbang, Rick Hanson. Perception of Special Education Needs Teachers Towards In-service Training Programmes for Special Education in Sarawak. 2001.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Gumbang, Rick Hanson. Perception of Special Education Needs Teachers Towards In-service Training Programmes for Special Education in Sarawak. 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.