FBM. (1993). Soil management: A useful guidebook for farm managers with common soil problems. Illinois: John Deere.
استشهاد بنمط شيكاغوFBM. Soil Management: A Useful Guidebook for Farm Managers With Common Soil Problems. Illinois: John Deere, 1993.
MLA استشهادFBM. Soil Management: A Useful Guidebook for Farm Managers With Common Soil Problems. Illinois: John Deere, 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.