Hartmut Albrecht. (1989). Rural development series: Agricultural extension; T1. Eschborn: Technical Cooperation - Federal Republic of Germany.
استشهاد بنمط شيكاغوHartmut Albrecht. Rural Development Series: Agricultural Extension; T1. Eschborn: Technical Cooperation - Federal Republic of Germany, 1989.
MLA استشهادHartmut Albrecht. Rural Development Series: Agricultural Extension; T1. Eschborn: Technical Cooperation - Federal Republic of Germany, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.