Wan Ismail, W. H. (1993). Perceived Importance and Practices of Programme Development Steps and Principles by Extension Supervisors in the Department of Agriculture, Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wan Ismail, Wan Hanisah. Perceived Importance and Practices of Programme Development Steps and Principles by Extension Supervisors in the Department of Agriculture, Malaysia. 1993.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wan Ismail, Wan Hanisah. Perceived Importance and Practices of Programme Development Steps and Principles by Extension Supervisors in the Department of Agriculture, Malaysia. 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.