Herren, R. V. (2007). The science of agriculture: A biological approach. Clifton Park, NY: Thomson/Delmar Learning.
استشهاد بنمط شيكاغوHerren, Ray V. The Science of Agriculture: A Biological Approach. Clifton Park, NY: Thomson/Delmar Learning, 2007.
MLA استشهادHerren, Ray V. The Science of Agriculture: A Biological Approach. Clifton Park, NY: Thomson/Delmar Learning, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.