Ahamad Sipon. (1996). The applicability of Herzberg's two-factor theory to the job satisfaction of Malaysian polytechnic instructors. Virginia Polytechnic Institute.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ahamad Sipon. The Applicability of Herzberg's Two-factor Theory to the Job Satisfaction of Malaysian Polytechnic Instructors. Blacksburg, Va.: Virginia Polytechnic Institute, 1996.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ahamad Sipon. The Applicability of Herzberg's Two-factor Theory to the Job Satisfaction of Malaysian Polytechnic Instructors. Virginia Polytechnic Institute, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.