Extension, Education and Communication Service, Research, Extension and Training Division, Sustainable Development Department, & Rivera, W. M. (2003). Agricultural extension, rural development and the food security challenge.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Extension, Education and Communication Service, Extension and Training Division Research, Sustainable Development Department, و William McLeod Rivera. Agricultural Extension, Rural Development and the Food Security Challenge. 2003.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Extension, Education and Communication Service, et al. Agricultural Extension, Rural Development and the Food Security Challenge. 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.