Khalil, A. H. O. (2008). Relationships between Extension Competencies, Organisational Commitment and Job Satisfaction with Performance of Agricultural Extension Workers in Yemen.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Khalil, Ali Hassan Obaid. Relationships Between Extension Competencies, Organisational Commitment and Job Satisfaction with Performance of Agricultural Extension Workers in Yemen. 2008.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Khalil, Ali Hassan Obaid. Relationships Between Extension Competencies, Organisational Commitment and Job Satisfaction with Performance of Agricultural Extension Workers in Yemen. 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.